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Eggs

108 eggs at true relative size, from the 13.5 mm egg of the Cuban Gnatcatcher to the 26.2 mm egg of the Giant Wren.

About this collection. 4,422 eggs, covering nearly every bird that nests in the Americas, from Canada and the United States through Mexico, Central America and the Caribbean to South America, plus a few famous eggs from elsewhere, like the Ostrich and the extinct Elephant Bird. Sizes come from published measurements wherever we found them; shapes and colours are our best estimates (how accurate these eggs are).

2,118 of them are marked Speculative: we haven't found documented descriptions or measurements of these eggs yet (for 129 of them, a source we checked reports the egg as undescribed), so they are estimated from their closest relatives. They are hidden unless you untick Hide speculative eggs. We keep adding sources and update the eggs as we go. Have you seen one of these eggs, or know a source? Message us.

Make a poster of these 108 eggs
Illustration of a Giant Wren (Campylorhynchus chiapensis) egg, 26.2 × 17.5 mm Illustration of a Stripe-backed Wren (Campylorhynchus nuchalis) egg, 25.6 × 16.4 mm Illustration of a Bicolored Wren (Campylorhynchus griseus) egg, 24.6 × 17.4 mm Illustration of a Bay Wren (Cantorchilus nigricapillus) egg, 24 × 16.5 mm Illustration of a Musician Wren (Cyphorhinus arada) egg, 24 × 16.6 mm Illustration of a Song Wren (Cyphorhinus phaeocephalus) egg, 24 × 16.6 mm Illustration of a Southern Chestnut-breasted Wren (Cyphorhinus thoracicus) egg, 24 × 16.6 mm Illustration of a Cactus Wren (Campylorhynchus brunneicapillus) egg, 23.6 × 17 mm Illustration of a Fasciated Wren (Campylorhynchus fasciatus) egg, 23.1 × 15.9 mm Illustration of a Grey-barred Wren (Campylorhynchus megalopterus) egg, 23.1 × 16.4 mm Illustration of a Thrush-like Wren (Campylorhynchus turdinus) egg, 23.1 × 16.5 mm Illustration of a Veracruz Wren (Campylorhynchus rufinucha) egg, 23.1 × 16.4 mm Illustration of a White-headed Wren (Campylorhynchus albobrunneus) egg, 23.1 × 16.4 mm Illustration of a Yucatan Wren (Campylorhynchus yucatanicus) egg, 23.1 × 16.4 mm Illustration of a Coraya Wren (Pheugopedius coraya) egg, 23 × 15 mm Illustration of a Spotted Wren (Campylorhynchus gularis) egg, 23 × 16.5 mm Illustration of a Flutist Wren (Microcerculus ustulatus) egg, 22.6 × 18 mm Illustration of a Northern Nightingale-Wren (Microcerculus philomela) egg, 22.6 × 18 mm Illustration of a Southern Nightingale-Wren (Microcerculus marginatus) egg, 22.6 × 18 mm Illustration of a Wing-banded Wren (Microcerculus bambla) egg, 22.6 × 18 mm Illustration of a Band-backed Wren (Campylorhynchus zonatus) egg, 22 × 15.8 mm Illustration of a Rufous-and-white Wren (Thryophilus rufalbus) egg, 22 × 15.5 mm Illustration of a Russet-naped Wren (Campylorhynchus humilis) egg, 22 × 16 mm Illustration of a Grey-breasted Wood Wren (Henicorhina leucophrys) egg, 21.98 × 15.25 mm Illustration of a Bar-winged Wood Wren (Henicorhina leucoptera) egg, 21.9 × 15 mm Illustration of a Cabanis's Wren (Cantorchilus modestus) egg, 21.9 × 15.3 mm Illustration of a Hermit Wood Wren (Henicorhina anachoreta) egg, 21.9 × 15 mm Illustration of a Munchique Wood Wren (Henicorhina negreti) egg, 21.9 × 15 mm Illustration of a White-breasted Wood Wren (Henicorhina leucosticta) egg, 21.9 × 14.7 mm Illustration of a Rufous-backed Wren (Campylorhynchus capistratus) egg, 21.8 × 16.2 mm Illustration of a Riverside Wren (Cantorchilus semibadius) egg, 21.5 × 15.4 mm Illustration of a Boucard's Wren (Campylorhynchus jocosus) egg, 21.11 × 15.8 mm Illustration of a Buff-breasted Wren (Cantorchilus leucotis) egg, 20.6 × 14.8 mm Illustration of a Canebrake Wren (Cantorchilus zeledoni) egg, 20.6 × 15 mm Illustration of a Fawn-breasted Wren (Cantorchilus guarayanus) egg, 20.6 × 15 mm Illustration of a Grey Wren (Cantorchilus griseus) egg, 20.6 × 15 mm Illustration of an Isthmian Wren (Cantorchilus elutus) egg, 20.6 × 15 mm Illustration of a Stripe-throated Wren (Cantorchilus leucopogon) egg, 20.6 × 15 mm Illustration of a Happy Wren (Pheugopedius felix) egg, 20.5 × 14 mm Illustration of a Grey-mantled Wren (Odontorchilus branickii) egg, 20.4 × 14.9 mm Illustration of a Nava's Wren (Hylorchilus navai) egg, 20.4 × 14.9 mm Illustration of a Sumichrast's Wren (Hylorchilus sumichrasti) egg, 20.4 × 14.9 mm Illustration of a Timberline Wren (Thryorchilus browni) egg, 20.4 × 14.9 mm Illustration of a Tooth-billed Wren (Odontorchilus cinereus) egg, 20.4 × 14.9 mm Illustration of a White-bellied Wren (Uropsila leucogastra) egg, 20.4 × 14.9 mm Illustration of a Zapata Wren (Ferminia cerverai) egg, 20.4 × 14.9 mm Illustration of a Stripe-breasted Wren (Cantorchilus thoracicus) egg, 20.3 × 14 mm Illustration of a Superciliated Wren (Cantorchilus superciliaris) egg, 20.3 × 14.8 mm Illustration of a Moustached Wren (Pheugopedius genibarbis) egg, 20.25 × 14.5 mm Illustration of an Antioquia Wren (Thryophilus sernai) egg, 20.2 × 14.4 mm Illustration of a Banded Wren (Thryophilus pleurostictus) egg, 20.2 × 14.4 mm Illustration of a Black-bellied Wren (Pheugopedius fasciatoventris) egg, 20.2 × 14.5 mm Illustration of a Black-throated Wren (Pheugopedius atrogularis) egg, 20.2 × 14.5 mm Illustration of an Inca Wren (Pheugopedius eisenmanni) egg, 20.2 × 14.5 mm Illustration of a Niceforo's Wren (Thryophilus nicefori) egg, 20.2 × 14.4 mm Illustration of a Plain-tailed Wren (Pheugopedius euophrys) egg, 20.2 × 14.5 mm Illustration of a Sooty-headed Wren (Pheugopedius spadix) egg, 20.2 × 14.5 mm Illustration of a Speckle-breasted Wren (Pheugopedius sclateri) egg, 20.2 × 14.5 mm Illustration of a Whiskered Wren (Pheugopedius mystacalis) egg, 20.2 × 14.5 mm Illustration of a Long-billed Wren (Cantorchilus longirostris) egg, 20 × 15 mm Illustration of a Sinaloa Wren (Thryophilus sinaloa) egg, 20 × 13.5 mm Illustration of a Spot-breasted Wren (Pheugopedius maculipectus) egg, 20 × 15 mm Illustration of a Trilling Gnatwren (Ramphocaenus melanurus) egg, 19.45 × 13.9 mm Illustration of a Chattering Gnatwren (Ramphocaenus sticturus) egg, 19.4 × 13.9 mm Illustration of a Carolina Wren (Thryothorus ludovicianus) egg, 19.1 × 14.9 mm Illustration of a Tawny-faced Gnatwren (Microbates cinereiventris) egg, 18.65 × 14 mm Illustration of a Collared Gnatwren (Microbates collaris) egg, 18.6 × 14 mm Illustration of a Rock Wren (Salpinctes obsoletus) egg, 18.6 × 14.8 mm Illustration of a Rufous-breasted Wren (Pheugopedius rutilus) egg, 18.2 × 13.8 mm Illustration of a Fulvous Wren (Cinnycerthia fulva) egg, 18 × 13 mm Illustration of a Peruvian Wren (Cinnycerthia peruana) egg, 18 × 13 mm Illustration of a Rufous Wren (Cinnycerthia unirufa) egg, 18 × 13 mm Illustration of a Rufous-browed Wren (Troglodytes rufociliatus) egg, 18 × 13.5 mm Illustration of a Sepia-brown Wren (Cinnycerthia olivascens) egg, 18 × 13 mm Illustration of a Canyon Wren (Catherpes mexicanus) egg, 17.9 × 13.2 mm Illustration of a Southern House Wren (Troglodytes musculus) egg, 17.8 × 13.4 mm Illustration of a Mountain Wren (Troglodytes solstitialis) egg, 17 × 13.3 mm Illustration of a Clarion Wren (Troglodytes tanneri) egg, 16.9 × 13 mm Illustration of a Cobb's Wren (Troglodytes cobbi) egg, 16.9 × 13 mm Illustration of a Cozumel Wren (Troglodytes beani) egg, 16.9 × 13 mm Illustration of an Ochraceous Wren (Troglodytes ochraceus) egg, 16.9 × 13 mm Illustration of a Santa Marta Wren (Troglodytes monticola) egg, 16.9 × 13 mm Illustration of a Socorro Wren (Troglodytes sissonii) egg, 16.9 × 13 mm Illustration of a Tepui Wren (Troglodytes rufulus) egg, 16.9 × 13 mm Illustration of a Grass Wren (Cistothorus platensis) egg, 16.7 × 12.3 mm Illustration of a Winter Wren (Troglodytes hiemalis) egg, 16.7 × 12.5 mm Illustration of an Apolinar's Wren (Cistothorus apolinari) egg, 16.5 × 12.3 mm Illustration of a Marsh Wren (Cistothorus palustris) egg, 16.5 × 12.4 mm Illustration of a Merida Wren (Cistothorus meridae) egg, 16.5 × 12.3 mm Illustration of a Bewick's Wren (Thryomanes bewickii) egg, 16.4 × 12.7 mm Illustration of a House Wren (Troglodytes aedon) egg, 16.4 × 12.7 mm Illustration of a Pacific Wren (Troglodytes pacificus) egg, 16.4 × 12.4 mm Illustration of a Masked Gnatcatcher (Polioptila dumicola) egg, 16.1 × 11.4 mm Illustration of a Sedge Wren (Cistothorus stellaris) egg, 16 × 12 mm Illustration of a Blue-gray Gnatcatcher (Polioptila caerulea) egg, 14.5 × 11.2 mm Illustration of a Black-tailed Gnatcatcher (Polioptila melanura) egg, 14.4 × 11.5 mm Illustration of a Tropical Gnatcatcher (Polioptila plumbea) egg, 14.4 × 11.7 mm Illustration of a Black-capped Gnatcatcher (Polioptila nigriceps) egg, 14.3 × 11.5 mm Illustration of a California Gnatcatcher (Polioptila californica) egg, 14.3 × 11.4 mm Illustration of a Creamy-bellied Gnatcatcher (Polioptila lactea) egg, 14.3 × 11.5 mm Illustration of a Guianan Gnatcatcher (Polioptila guianensis) egg, 14.3 × 11.5 mm Illustration of an Iquitos Gnatcatcher (Polioptila clementsi) egg, 14.3 × 11.5 mm Illustration of a Para Gnatcatcher (Polioptila paraensis) egg, 14.3 × 11.5 mm Illustration of a Slate-throated Gnatcatcher (Polioptila schistaceigula) egg, 14.3 × 11.5 mm Illustration of a White-browed Gnatcatcher (Polioptila bilineata) egg, 14.3 × 11.9 mm Illustration of a White-lored Gnatcatcher (Polioptila albiloris) egg, 14.2 × 11.7 mm Illustration of a Yucatan Gnatcatcher (Polioptila albiventris) egg, 14.2 × 11.7 mm Illustration of a Cuban Gnatcatcher (Polioptila lembeyei) egg, 13.5 × 10.5 mm
All 108 eggs at the same scale, largest first. Tap an egg to jump to it.
Illustration of an Antioquia Wren (Thryophilus sernai) egg, 20.2 × 14.4 mm

Antioquia Wren

Thryophilus sernai

  • 20.2 × 14.4 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Colombia

No documented description found yet; drawn like the Sinaloa Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Thryophilus pleurostictus, Thryophilus rufalbus, Thryophilus sinaloa.
Description
Estimated, no description found: drawn like a related egg (Sinaloa Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of an Apolinar's Wren (Cistothorus apolinari) egg, 16.5 × 12.3 mm

Apolinar's Wren

Cistothorus apolinari

  • 16.5 × 12.3 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Colombia

No documented description found yet; drawn like the Grass Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Cistothorus palustris, Cistothorus platensis, Cistothorus stellaris.
Description
Estimated, no description found: drawn like a related egg (Grass Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Band-backed Wren (Campylorhynchus zonatus) egg, 22 × 15.8 mm

Band-backed Wren

Campylorhynchus zonatus

  • 22 × 15.8 mm
  • Clutch: 3–5 eggs
Breeds in Mexico, Central America (7 countries) and South America (2 countries)
show all 10Mexico: Mexico
Central America: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama
South America: Colombia, Ecuador

White, immaculate or faintly marked with pale brown speckles, especially in a wreath about the thicker end.

Sources of information

Size
Average of 10 eggs: Skutch, A. F. 1960. Life histories of Central American birds II. Pacific Coast Avifauna 34., p. 194.
Agrees with: Wetmore, A., R. F. Pasquier & S. L. Olson 1984. The birds of the Republic of Panamá, part 4. Smithsonian Miscellaneous Collections 150(4)., p. 66.
Description
Skutch, A. F. 1960. Life Histories of Central American Birds II. Pacific Coast Avifauna 34.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Banded Wren (Thryophilus pleurostictus) egg, 20.2 × 14.4 mm

Banded Wren

Thryophilus pleurostictus

  • 20.2 × 14.4 mm
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
Breeds in Mexico, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua

No documented description found yet; drawn like the Sinaloa Wren egg (same genus).

Sources of information

Size
Average of 4 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., p. 342.
Description
Estimated, no description found: drawn like a related egg (Sinaloa Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Bar-winged Wood Wren (Henicorhina leucoptera) egg, 21.9 × 15 mm

Bar-winged Wood Wren

Henicorhina leucoptera

  • 21.9 × 15 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Ecuador, Peru

No documented description found yet; drawn like the White-breasted Wood Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Henicorhina leucophrys, Henicorhina leucosticta.
Description
Estimated, no description found: drawn like a related egg (White-breasted Wood Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Bay Wren (Cantorchilus nigricapillus) egg, 24 × 16.5 mm

Bay Wren

Cantorchilus nigricapillus

  • 24 × 16.5 mm
  • Clutch: 3 eggs
Breeds in Costa Rica, Honduras, Nicaragua, Panama, Colombia, Ecuador

Pure white, sparingly speckled with cinnamon-brown over the whole surface, more thickly about the larger end.

Sources of information

Size
Average of 3 eggs: Wetmore, A., R. F. Pasquier & S. L. Olson 1984. The birds of the Republic of Panamá, part 4. Smithsonian Miscellaneous Collections 150(4)., p. 87.
Description
Wetmore, Pasquier & Olson 1984, The Birds of the Republic of Panamá, Part 4 (Smithsonian Misc. Coll. 150).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Bewick's Wren (Thryomanes bewickii) egg, 16.4 × 12.7 mm

Bewick's Wren

Thryomanes bewickii

  • 16.4 × 12.7 mm
  • Clutch: 3–8 eggs
Breeds in Canada, United States, Mexico

White with reddish-brown or purplish spots.

Sources of information

Size
Average of 40 eggs: Bent, Life Histories of North American Nuthatches, Wrens, Thrashers, and Their Allies (U.S. National Museum Bulletin 195, 1948), p. 178.
Agrees with: Cornell Lab of Ornithology, All About Birds: Bewick's Wren, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Bewick's Wren, Life History.
Drawing checked against a photo: Bird Eggs of Canada photo (Royal Alberta Museum).
Clutch
Cornell Lab of Ornithology, All About Birds.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Bicolored Wren (Campylorhynchus griseus) egg, 24.6 × 17.4 mm

Bicolored Wren

Campylorhynchus griseus

  • 24.6 × 17.4 mm
Breeds in Panama, Brazil, Colombia, Guyana, Venezuela

Reddish white, usually covered all over with fine red-brown to brick-red speckling and a few darker spots; slightly glossy.

Sources of information

Size
Average of 4 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., p. 334.
Description
Penard, F. P. & A. P. Penard 1910. De vogels van Guyana (Suriname, Cayenne en Demerara), deel 2. Paramaribo., p. 520; Todd & Carriker 1922, p. 426.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Black-bellied Wren (Pheugopedius fasciatoventris) egg, 20.2 × 14.5 mm

Black-bellied Wren

Pheugopedius fasciatoventris

  • 20.2 × 14.5 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Costa Rica, Panama, Colombia

No documented description found yet; drawn like the Moustached Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Pheugopedius coraya, Pheugopedius felix, Pheugopedius genibarbis, Pheugopedius maculipectus, Pheugopedius rutilus.
Description
Estimated, no description found: drawn like a related egg (Moustached Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Black-capped Gnatcatcher (Polioptila nigriceps) egg, 14.3 × 11.5 mm

Black-capped Gnatcatcher

Polioptila nigriceps

  • 14.3 × 11.5 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in United States, Mexico

No documented description found yet; drawn like the Tropical Gnatcatcher egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Polioptila albiloris, Polioptila albiventris, Polioptila bilineata, Polioptila caerulea, Polioptila californica ….
Description
Estimated, no description found: drawn like a related egg (Tropical Gnatcatcher).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Black-tailed Gnatcatcher (Polioptila melanura) egg, 14.4 × 11.5 mm

Black-tailed Gnatcatcher

Polioptila melanura

  • 14.4 × 11.5 mm
  • Clutch: 3–5 eggs
Breeds in United States, Mexico

Pale-white to pale-blue, variably speckled in red.

Sources of information

Size
Average of 36 eggs: Bent, Life Histories of North American Thrushes, Kinglets, and Their Allies (U.S. National Museum Bulletin 196, 1949), p. 377.
Description
Cornell Lab of Ornithology, All About Birds: Black-tailed Gnatcatcher, Life History.
Clutch
Cornell Lab of Ornithology, All About Birds.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Black-throated Wren (Pheugopedius atrogularis) egg, 20.2 × 14.5 mm

Black-throated Wren

Pheugopedius atrogularis

  • 20.2 × 14.5 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Costa Rica, Honduras, Nicaragua, Panama

No documented description found yet; drawn like the Moustached Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Pheugopedius coraya, Pheugopedius felix, Pheugopedius genibarbis, Pheugopedius maculipectus, Pheugopedius rutilus.
Description
Estimated, no description found: drawn like a related egg (Moustached Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Blue-gray Gnatcatcher (Polioptila caerulea) egg, 14.5 × 11.2 mm

Blue-gray Gnatcatcher

Polioptila caerulea

  • 14.5 × 11.2 mm
  • Clutch: 3–5 eggs
Breeds in Canada, United States, Mexico, Belize, Guatemala, Nicaragua, Caribbean islands

Pale blue spotted with reddish to dark brown.

Sources of information

Size
Average of 50 eggs: Bent, Life Histories of North American Thrushes, Kinglets, and Their Allies (U.S. National Museum Bulletin 196, 1949), p. 351.
Agrees with: Cornell Lab of Ornithology, All About Birds: Blue-gray Gnatcatcher, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Blue-gray Gnatcatcher, Life History.
Drawing checked against a photo: Bird Eggs of Canada photo (University of Saskatchewan Department of Biology Natural History Collection).
Clutch
Cornell Lab of Ornithology, All About Birds.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Boucard's Wren (Campylorhynchus jocosus) egg, 21.11 × 15.8 mm

Boucard's Wren

Campylorhynchus jocosus

  • 21.11 × 15.8 mm
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
Breeds in Mexico

No documented description found yet; drawn like the Veracruz Wren egg (same genus).

Sources of information

Size
Average of 7 eggs: Stoddard, M. C., et al. 2017. Avian egg shape: form, function, and evolution. Science 356: 1249-1254 (Data S1, MVZ egg collection).
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Buff-breasted Wren (Cantorchilus leucotis) egg, 20.6 × 14.8 mm

Buff-breasted Wren

Cantorchilus leucotis

  • 20.6 × 14.8 mm
  • Clutch: 2–3 eggs
Breeds in Panama and South America (10 countries)
show all 11Central America: Panama
South America: Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, Suriname, Venezuela

White to greyish or bluish white, slightly glossy, sparingly marked yellowish- to rust-brown chiefly at the larger end (sometimes a cap), purplish undermarks.

Sources of information

Size
Hellebrekers, W. P. J. 1942. Revision of the Penard oölogical collection from Surinam. Zoologische Mededelingen 24: 240–275., p. 274.
Description
Hellebrekers 1942, Revision of the Penard oölogical collection from Surinam (Zool. Meded. 24).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Cabanis's Wren (Cantorchilus modestus) egg, 21.9 × 15.3 mm

Cabanis's Wren

Cantorchilus modestus

  • 21.9 × 15.3 mm
  • Clutch: 2 eggs
Breeds in Mexico, Belize, El Salvador, Guatemala, Honduras, Nicaragua

Pure white, unmarked, rather elongate.

Sources of information

Size
Average of 8 eggs: Skutch, A. F. 1960. Life histories of Central American birds II. Pacific Coast Avifauna 34., p. 128.
Description
Skutch 1960, Life Histories of Central American Birds II (Pacific Coast Avifauna 34).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Cactus Wren (Campylorhynchus brunneicapillus) egg, 23.6 × 17 mm

Cactus Wren

Campylorhynchus brunneicapillus

  • 23.6 × 17 mm
  • Clutch: 2–7 eggs
Breeds in United States, Mexico

Salmon pink to buff with reddish brown spots.

Sources of information

Size
Average of 50 eggs: Bent, Life Histories of North American Nuthatches, Wrens, Thrashers, and Their Allies (U.S. National Museum Bulletin 195, 1948), p. 225.
Agrees with: Cornell Lab of Ornithology, All About Birds: Cactus Wren, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Cactus Wren, Life History.
Clutch
Cornell Lab of Ornithology, All About Birds.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a California Gnatcatcher (Polioptila californica) egg, 14.3 × 11.4 mm

California Gnatcatcher

Polioptila californica

  • 14.3 × 11.4 mm
  • Clutch: 2–5 eggs
Breeds in United States, Mexico

White with small spots of reddish brown scattered throughout.

Sources of information

Size
Average of 40 eggs: Bent, Life Histories of North American Thrushes, Kinglets, and Their Allies (U.S. National Museum Bulletin 196, 1949), p. 367.
Agrees with: Cornell Lab of Ornithology, All About Birds: California Gnatcatcher, Life History.
Description
Cornell Lab of Ornithology, All About Birds: California Gnatcatcher, Life History.
Clutch
Cornell Lab of Ornithology, All About Birds.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Canebrake Wren (Cantorchilus zeledoni) egg, 20.6 × 15 mm

Canebrake Wren

Cantorchilus zeledoni

  • 20.6 × 15 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Costa Rica, Panama

No documented description found yet; drawn like the Buff-breasted Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Cantorchilus leucotis, Cantorchilus longirostris, Cantorchilus modestus, Cantorchilus nigricapillus, Cantorchilus semibadius ….
Description
Estimated, no description found: drawn like a related egg (Buff-breasted Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Canyon Wren (Catherpes mexicanus) egg, 17.9 × 13.2 mm

Canyon Wren

Catherpes mexicanus

  • 17.9 × 13.2 mm
  • Clutch: 4–6 eggs
Breeds in Canada, United States, Mexico

White, with small, faint reddish-brown dots.

Sources of information

Size
Average of 50 eggs: Bent, Life Histories of North American Nuthatches, Wrens, Thrashers, and Their Allies (U.S. National Museum Bulletin 195, 1948), p. 281.
Agrees with: Cornell Lab of Ornithology, All About Birds: Canyon Wren, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Canyon Wren, Life History.
Drawing checked against a photo: Bird Eggs of Canada photo (University of Saskatchewan Department of Biology Natural History Collection).
Clutch
Cornell Lab of Ornithology, All About Birds.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Carolina Wren (Thryothorus ludovicianus) egg, 19.1 × 14.9 mm

Carolina Wren

Thryothorus ludovicianus

  • 19.1 × 14.9 mm
  • Clutch: 3–7 eggs
Breeds in Canada, United States, Mexico, Belize, Guatemala, Honduras, Nicaragua

White, cream, or pinkish white, with fine rusty-brown spots.

Sources of information

Size
Average of 50 eggs: Bent, Life Histories of North American Nuthatches, Wrens, Thrashers, and Their Allies (U.S. National Museum Bulletin 195, 1948), p. 208.
Agrees with: Cornell Lab of Ornithology, All About Birds: Carolina Wren, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Carolina Wren, Life History.
Drawing checked against a photo: Bird Eggs of Canada photo (University of Saskatchewan Department of Biology Natural History Collection).
Clutch
Cornell Lab of Ornithology, All About Birds.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Chattering Gnatwren (Ramphocaenus sticturus) egg, 19.4 × 13.9 mm

Chattering Gnatwren

Ramphocaenus sticturus

  • 19.4 × 13.9 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Bolivia, Brazil, Peru

No documented description found yet; drawn like the Trilling Gnatwren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Ramphocaenus melanurus.
Description
Estimated, no description found: drawn like a related egg (Trilling Gnatwren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Clarion Wren (Troglodytes tanneri) egg, 16.9 × 13 mm

Clarion Wren

Troglodytes tanneri

  • 16.9 × 13 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Mexico

No documented description found yet; drawn like the Winter Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Troglodytes aedon, Troglodytes hiemalis, Troglodytes musculus, Troglodytes pacificus, Troglodytes rufociliatus ….
Description
Estimated, no description found: drawn like a related egg (Winter Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Cobb's Wren (Troglodytes cobbi) egg, 16.9 × 13 mm

Cobb's Wren

Troglodytes cobbi

  • 16.9 × 13 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Falkland Islands

No documented description found yet; drawn like the Winter Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Troglodytes aedon, Troglodytes hiemalis, Troglodytes musculus, Troglodytes pacificus, Troglodytes rufociliatus ….
Description
Estimated, no description found: drawn like a related egg (Winter Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Collared Gnatwren (Microbates collaris) egg, 18.6 × 14 mm

Collared Gnatwren

Microbates collaris

  • 18.6 × 14 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela

No documented description found yet; drawn like the Tawny-faced Gnatwren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Microbates cinereiventris.
Description
Estimated, no description found: drawn like a related egg (Tawny-faced Gnatwren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Coraya Wren (Pheugopedius coraya) egg, 23 × 15 mm

Coraya Wren

Pheugopedius coraya

  • 23 × 15 mm (approx.)
Breeds in Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela

White with delicate red-brown spots and dots forming a wreath at the blunt end.

Sources of information

Size
Nehrkorn, A. 1899. Katalog der Eiersammlung nebst Beschreibungen der aussereuropäischen Eier. Braunschweig.
Description
Nehrkorn 1899 (Katalog der Eiersammlung).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Cozumel Wren (Troglodytes beani) egg, 16.9 × 13 mm

Cozumel Wren

Troglodytes beani

  • 16.9 × 13 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Mexico

No documented description found yet; drawn like the Winter Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Troglodytes aedon, Troglodytes hiemalis, Troglodytes musculus, Troglodytes pacificus, Troglodytes rufociliatus ….
Description
Estimated, no description found: drawn like a related egg (Winter Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Creamy-bellied Gnatcatcher (Polioptila lactea) egg, 14.3 × 11.5 mm

Creamy-bellied Gnatcatcher

Polioptila lactea

  • 14.3 × 11.5 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Argentina, Brazil, Paraguay

No documented description found yet; drawn like the Tropical Gnatcatcher egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Polioptila albiloris, Polioptila albiventris, Polioptila bilineata, Polioptila caerulea, Polioptila californica ….
Description
Estimated, no description found: drawn like a related egg (Tropical Gnatcatcher).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Cuban Gnatcatcher (Polioptila lembeyei) egg, 13.5 × 10.5 mm

Cuban Gnatcatcher

Polioptila lembeyei

  • 13.5 × 10.5 mm (approx.)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
Breeds in Caribbean islands

Pale bluish white, speckled with reddish brown (assumed from Polioptila relatives).

Sources of information

Size
Nehrkorn, A. 1899. Katalog der Eiersammlung nebst Beschreibungen der aussereuropäischen Eier. Braunschweig.
Description
Nehrkorn 1899 (Katalog der Eiersammlung).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Fasciated Wren (Campylorhynchus fasciatus) egg, 23.1 × 15.9 mm

Fasciated Wren

Campylorhynchus fasciatus

  • 23.1 × 15.9 mm
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
Breeds in Ecuador, Peru

No documented description found yet; drawn like the Veracruz Wren egg (same genus).

Sources of information

Size
Average of 2 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., p. 335.
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Fawn-breasted Wren (Cantorchilus guarayanus) egg, 20.6 × 15 mm

Fawn-breasted Wren

Cantorchilus guarayanus

  • 20.6 × 15 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Bolivia, Brazil, Paraguay

No documented description found yet; drawn like the Buff-breasted Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Cantorchilus leucotis, Cantorchilus longirostris, Cantorchilus modestus, Cantorchilus nigricapillus, Cantorchilus semibadius ….
Description
Estimated, no description found: drawn like a related egg (Buff-breasted Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Flutist Wren (Microcerculus ustulatus) egg, 22.6 × 18 mm

Flutist Wren

Microcerculus ustulatus

  • 22.6 × 18 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Brazil, Guyana, Venezuela

No documented description found yet; drawn like the Veracruz Wren egg (same family).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Microcerculus marginatus.
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Fulvous Wren (Cinnycerthia fulva) egg, 18 × 13 mm

Fulvous Wren

Cinnycerthia fulva

  • 18 × 13 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Bolivia, Peru

No documented description found yet; drawn like the Winter Wren egg (same family).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Cinnycerthia unirufa.
Description
Estimated, no description found: drawn like a related egg (Winter Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Giant Wren (Campylorhynchus chiapensis) egg, 26.2 × 17.5 mm

Giant Wren

Campylorhynchus chiapensis

  • 26.2 × 17.5 mm (approx.)
Breeds in Mexico, Guatemala

Light yellowish brown, very heavily clouded with brown, especially in a wreath round the blunt end where the brown looks practically solid.

Sources of information

Size
Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., p. 334.
Description
Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., pdf p. 14.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Grass Wren (Cistothorus platensis) egg, 16.7 × 12.3 mm

Grass Wren

Cistothorus platensis

  • 16.7 × 12.3 mm
  • Clutch: 3–5 eggs
Breeds in Mexico, Central America (4 countries) and South America (12 countries)
show all 17Mexico: Mexico
Central America: Belize, Costa Rica, Guatemala, Honduras
South America: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Falkland Islands, Guyana, Paraguay, Peru, Uruguay, Venezuela

White, slightly glossy, unmarked.

Sources of information

Size
Average of 8 eggs: Salvador, S. A. & Salvador, L. A. 1988. Nidificación de aves en Pampa de Achala, Córdoba. Nuestras Aves 16: 20-23.
Agrees with: Salvador, S. A. & Narosky, S. 1984. Notas sobre nidificación de aves andinas en la Argentina. El Hornero 12(3): 184-188, p. 186.
Description
Salvador, S. A. & Salvador, L. A. 1988 (Pampa de Achala, Córdoba, Argentina).
Drawing checked against a photo: de la Peña 2025, Aves Argentinas tomo 10, p. 102.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Grey Wren (Cantorchilus griseus) egg, 20.6 × 15 mm

Grey Wren

Cantorchilus griseus

  • 20.6 × 15 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Brazil

No documented description found yet; drawn like the Buff-breasted Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Cantorchilus leucotis, Cantorchilus longirostris, Cantorchilus modestus, Cantorchilus nigricapillus, Cantorchilus semibadius ….
Description
Estimated, no description found: drawn like a related egg (Buff-breasted Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Grey-barred Wren (Campylorhynchus megalopterus) egg, 23.1 × 16.4 mm

Grey-barred Wren

Campylorhynchus megalopterus

  • 23.1 × 16.4 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Mexico

No documented description found yet; drawn like the Veracruz Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Campylorhynchus brunneicapillus, Campylorhynchus capistratus, Campylorhynchus chiapensis, Campylorhynchus fasciatus, Campylorhynchus griseus ….
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Grey-breasted Wood Wren (Henicorhina leucophrys) egg, 21.98 × 15.25 mm

Grey-breasted Wood Wren

Henicorhina leucophrys

  • 21.98 × 15.25 mm
  • Clutch: 2 eggs
Breeds in Mexico, Central America (5 countries) and South America (5 countries)
show all 11Mexico: Mexico
Central America: Costa Rica, El Salvador, Guatemala, Honduras, Panama
South America: Bolivia, Colombia, Ecuador, Peru, Venezuela

Pure white, unmarked.

Sources of information

Size
Average of 4 eggs: Skutch, A. F. 1960. Life histories of Central American birds II. Pacific Coast Avifauna 34., p. 151.
Agrees with: Carriker 1910, quoted in Skutch, A. F. 1960. Life histories of Central American birds II. Pacific Coast Avifauna 34., p. 151; Wetmore, A., R. F. Pasquier & S. L. Olson 1984. The birds of the Republic of Panamá, part 4. Smithsonian Miscellaneous Collections 150(4)., p. 115.
Description
Skutch, A. F. 1960. Life Histories of Central American Birds II. Pacific Coast Avifauna 34.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Grey-mantled Wren (Odontorchilus branickii) egg, 20.4 × 14.9 mm

Grey-mantled Wren

Odontorchilus branickii

  • 20.4 × 14.9 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Bolivia, Colombia, Ecuador, Peru

No documented description found yet; drawn like the Veracruz Wren egg (same family).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same family: Campylorhynchus brunneicapillus, Campylorhynchus capistratus, Campylorhynchus chiapensis, Campylorhynchus fasciatus, Campylorhynchus griseus ….
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Guianan Gnatcatcher (Polioptila guianensis) egg, 14.3 × 11.5 mm

Guianan Gnatcatcher

Polioptila guianensis

  • 14.3 × 11.5 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Brazil, French Guiana, Guyana, Suriname

No documented description found yet; drawn like the Tropical Gnatcatcher egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Polioptila albiloris, Polioptila albiventris, Polioptila bilineata, Polioptila caerulea, Polioptila californica ….
Description
Estimated, no description found: drawn like a related egg (Tropical Gnatcatcher).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Happy Wren (Pheugopedius felix) egg, 20.5 × 14 mm

Happy Wren

Pheugopedius felix

  • 20.5 × 14 mm
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
Breeds in Mexico

No documented description found yet; drawn like the Moustached Wren egg (same genus).

Sources of information

Size
Average of 4 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., p. 341.
Description
Estimated, no description found: drawn like a related egg (Moustached Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Hermit Wood Wren (Henicorhina anachoreta) egg, 21.9 × 15 mm

Hermit Wood Wren

Henicorhina anachoreta

  • 21.9 × 15 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Colombia

No documented description found yet; drawn like the White-breasted Wood Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Henicorhina leucophrys, Henicorhina leucosticta.
Description
Estimated, no description found: drawn like a related egg (White-breasted Wood Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a House Wren (Troglodytes aedon) egg, 16.4 × 12.7 mm

House Wren

Troglodytes aedon

  • 16.4 × 12.7 mm
  • Clutch: 3–10 eggs
Breeds in Canada, United States, Mexico, Caribbean islands

White, pink-white, or grayish, speckled or blotched with reddish brown.

Sources of information

Size
Average of 50 eggs: Bent, Life Histories of North American Nuthatches, Wrens, Thrashers, and Their Allies (U.S. National Museum Bulletin 195, 1948), p. 122.
Agrees with: Cornell Lab of Ornithology, All About Birds: House Wren, Life History.
Description
Cornell Lab of Ornithology, All About Birds: House Wren, Life History.
Drawing checked against a photo: Bird Eggs of Canada photo (Royal Saskatchewan Museum); de la Peña 2025, Aves Argentinas tomo 10, p. 90.
Clutch
Cornell Lab of Ornithology, All About Birds.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of an Inca Wren (Pheugopedius eisenmanni) egg, 20.2 × 14.5 mm

Inca Wren

Pheugopedius eisenmanni

  • 20.2 × 14.5 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Peru

No documented description found yet; drawn like the Moustached Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Pheugopedius coraya, Pheugopedius felix, Pheugopedius genibarbis, Pheugopedius maculipectus, Pheugopedius rutilus.
Description
Estimated, no description found: drawn like a related egg (Moustached Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of an Iquitos Gnatcatcher (Polioptila clementsi) egg, 14.3 × 11.5 mm

Iquitos Gnatcatcher

Polioptila clementsi

  • 14.3 × 11.5 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Peru

No documented description found yet; drawn like the Tropical Gnatcatcher egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Polioptila albiloris, Polioptila albiventris, Polioptila bilineata, Polioptila caerulea, Polioptila californica ….
Description
Estimated, no description found: drawn like a related egg (Tropical Gnatcatcher).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of an Isthmian Wren (Cantorchilus elutus) egg, 20.6 × 15 mm

Isthmian Wren

Cantorchilus elutus

  • 20.6 × 15 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Costa Rica, Panama

White, unmarked, strongly glossy.

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Cantorchilus leucotis, Cantorchilus longirostris, Cantorchilus modestus, Cantorchilus nigricapillus, Cantorchilus semibadius ….
Description
Nehrkorn 1899 (Katalog der Eiersammlung).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Long-billed Wren (Cantorchilus longirostris) egg, 20 × 15 mm

Long-billed Wren

Cantorchilus longirostris

  • 20 × 15 mm
Breeds in Brazil

Creamy white, fairly thickly speckled pale reddish-brown and lavender, densest in a zone at the broad end; glossless.

Sources of information

Size
Average of 14 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., p. 343.
Description
Oates & Reid 1905 (BM Egg Catalogue vol 4).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Marsh Wren (Cistothorus palustris) egg, 16.5 × 12.4 mm

Marsh Wren

Cistothorus palustris

  • 16.5 × 12.4 mm
  • Clutch: 3–10 eggs
Breeds in Canada, United States, Mexico

Brown with dark spots.

Sources of information

Size
Average of 40 eggs: Bent, Life Histories of North American Nuthatches, Wrens, Thrashers, and Their Allies (U.S. National Museum Bulletin 195, 1948), p. 253.
Agrees with: Cornell Lab of Ornithology, All About Birds: Marsh Wren, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Marsh Wren, Life History.
Drawing checked against a photo: Bird Eggs of Canada photo (Royal Saskatchewan Museum).
Clutch
Cornell Lab of Ornithology, All About Birds.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Masked Gnatcatcher (Polioptila dumicola) egg, 16.1 × 11.4 mm

Masked Gnatcatcher

Polioptila dumicola

  • 16.1 × 11.4 mm (approx.)
Breeds in Argentina, Bolivia, Brazil, Paraguay, Uruguay

Greenish-white to pale greenish blue, finely speckled reddish-brown all over, densest at the larger end.

Sources of information

Size
Oates, E. W. & S. G. Reid 1903. Catalogue of the Collection of Birds' Eggs in the British Museum, vol. 3. London., p. 270.
Description
Nehrkorn 1899 (Katalog der Eiersammlung); supporting: Oates & Reid 1903 (BM Egg Catalogue vol 3).
Drawing checked against a photo: de la Peña 2025, Aves Argentinas tomo 10, p. 111.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Merida Wren (Cistothorus meridae) egg, 16.5 × 12.3 mm

Merida Wren

Cistothorus meridae

  • 16.5 × 12.3 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Venezuela

No documented description found yet; drawn like the Grass Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Cistothorus palustris, Cistothorus platensis, Cistothorus stellaris.
Description
Estimated, no description found: drawn like a related egg (Grass Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Mountain Wren (Troglodytes solstitialis) egg, 17 × 13.3 mm

Mountain Wren

Troglodytes solstitialis

  • 17 × 13.3 mm (approx.)
Breeds in Argentina, Bolivia, Colombia, Ecuador, Peru, Venezuela

White, glossy, speckled pale red and lavender, denser at the large end.

Sources of information

Size
Oates, E. W. & S. G. Reid 1905. Catalogue of the Collection of Birds' Eggs in the British Museum, vol. 4. London.
Description
Oates & Reid 1905 (BM Egg Catalogue vol 4).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Moustached Wren (Pheugopedius genibarbis) egg, 20.25 × 14.5 mm

Moustached Wren

Pheugopedius genibarbis

  • 20.25 × 14.5 mm
Breeds in Bolivia, Brazil, Peru

White with brown freckles forming a wreath at the blunt end.

Sources of information

Size
Pinto 1953, Sobre a coleção Carlos Estevão de peles, ninhos e ovos das aves de Belém (Pará), Papéis Avulsos de Zoologia 11(13): 113–224, p. 197.
Description
Ihering 1900 (Revista do Museu Paulista 4).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Munchique Wood Wren (Henicorhina negreti) egg, 21.9 × 15 mm

Munchique Wood Wren

Henicorhina negreti

  • 21.9 × 15 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Colombia

No documented description found yet; drawn like the White-breasted Wood Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Henicorhina leucophrys, Henicorhina leucosticta.
Description
Estimated, no description found: drawn like a related egg (White-breasted Wood Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Musician Wren (Cyphorhinus arada) egg, 24 × 16.6 mm

Musician Wren

Cyphorhinus arada

  • 24 × 16.6 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in South America (9 countries)
show all 9South America: Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela

No documented description found yet; drawn like the Song Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Cyphorhinus phaeocephalus.
Description
Estimated, no description found: drawn like a related egg (Song Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Niceforo's Wren (Thryophilus nicefori) egg, 20.2 × 14.4 mm

Niceforo's Wren

Thryophilus nicefori

  • 20.2 × 14.4 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Colombia

No documented description found yet; drawn like the Sinaloa Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Thryophilus pleurostictus, Thryophilus rufalbus, Thryophilus sinaloa.
Description
Estimated, no description found: drawn like a related egg (Sinaloa Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Northern Nightingale-Wren (Microcerculus philomela) egg, 22.6 × 18 mm

Northern Nightingale-Wren

Microcerculus philomela

  • 22.6 × 18 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Mexico, Belize, Costa Rica, Guatemala, Honduras, Nicaragua

No documented description found yet; drawn like the Veracruz Wren egg (same family).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Microcerculus marginatus.
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of an Ochraceous Wren (Troglodytes ochraceus) egg, 16.9 × 13 mm

Ochraceous Wren

Troglodytes ochraceus

  • 16.9 × 13 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Costa Rica, Panama, Colombia

No documented description found yet; drawn like the Winter Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Troglodytes aedon, Troglodytes hiemalis, Troglodytes musculus, Troglodytes pacificus, Troglodytes rufociliatus ….
Description
Estimated, no description found: drawn like a related egg (Winter Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Pacific Wren (Troglodytes pacificus) egg, 16.4 × 12.4 mm

Pacific Wren

Troglodytes pacificus

  • 16.4 × 12.4 mm
  • Clutch: 1–9 eggs
Breeds in Canada, United States

White eggs with small pale to reddish brown spots concentrated on the larger end of the egg.

Sources of information

Size
Average of 40 eggs: Bent, Life Histories of North American Nuthatches, Wrens, Thrashers, and Their Allies (U.S. National Museum Bulletin 195, 1948), p. 173.
Agrees with: Cornell Lab of Ornithology, All About Birds: Pacific Wren, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Pacific Wren, Life History.
Clutch
Cornell Lab of Ornithology, All About Birds.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Para Gnatcatcher (Polioptila paraensis) egg, 14.3 × 11.5 mm

Para Gnatcatcher

Polioptila paraensis

  • 14.3 × 11.5 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Brazil

No documented description found yet; drawn like the Tropical Gnatcatcher egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Polioptila albiloris, Polioptila albiventris, Polioptila bilineata, Polioptila caerulea, Polioptila californica ….
Description
Estimated, no description found: drawn like a related egg (Tropical Gnatcatcher).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Peruvian Wren (Cinnycerthia peruana) egg, 18 × 13 mm

Peruvian Wren

Cinnycerthia peruana

  • 18 × 13 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Peru

No documented description found yet; drawn like the Winter Wren egg (same family).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Cinnycerthia unirufa.
Description
Estimated, no description found: drawn like a related egg (Winter Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Plain-tailed Wren (Pheugopedius euophrys) egg, 20.2 × 14.5 mm

Plain-tailed Wren

Pheugopedius euophrys

  • 20.2 × 14.5 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Colombia, Ecuador, Peru

No documented description found yet; drawn like the Moustached Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Pheugopedius coraya, Pheugopedius felix, Pheugopedius genibarbis, Pheugopedius maculipectus, Pheugopedius rutilus.
Description
Estimated, no description found: drawn like a related egg (Moustached Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Riverside Wren (Cantorchilus semibadius) egg, 21.5 × 15.4 mm

Riverside Wren

Cantorchilus semibadius

  • 21.5 × 15.4 mm
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
Breeds in Costa Rica, Panama

No documented description found yet; drawn like the Cabanis's Wren egg (same genus).

Sources of information

Size
Average of 3 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., p. 341.
Description
Estimated, no description found: drawn like a related egg (Cabanis's Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Rock Wren (Salpinctes obsoletus) egg, 18.6 × 14.8 mm

Rock Wren

Salpinctes obsoletus

  • 18.6 × 14.8 mm
  • Clutch: 4–8 eggs
Breeds in Canada, United States, Mexico, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua

White with fine spots of reddish brown.

Sources of information

Size
Average of 50 eggs: Bent, Life Histories of North American Nuthatches, Wrens, Thrashers, and Their Allies (U.S. National Museum Bulletin 195, 1948), p. 288.
Agrees with: Cornell Lab of Ornithology, All About Birds: Rock Wren, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Rock Wren, Life History.
Drawing checked against a photo: Bird Eggs of Canada photo (Royal Saskatchewan Museum).
Clutch
Cornell Lab of Ornithology, All About Birds.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Rufous Wren (Cinnycerthia unirufa) egg, 18 × 13 mm

Rufous Wren

Cinnycerthia unirufa

  • 18 × 13 mm (approx.)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
Breeds in Colombia, Ecuador, Peru, Venezuela

No documented description found yet; drawn like the Winter Wren egg (same family).

Sources of information

Size
Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., p. 340.
Description
Estimated, no description found: drawn like a related egg (Winter Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Rufous-and-white Wren (Thryophilus rufalbus) egg, 22 × 15.5 mm

Rufous-and-white Wren

Thryophilus rufalbus

  • 22 × 15.5 mm
Breeds in Mexico, Central America (6 countries) and South America (2 countries)
show all 9Mexico: Mexico
Central America: Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama
South America: Colombia, Venezuela

Greenish white, unmarked.

Sources of information

Size
Wetmore, A., R. F. Pasquier & S. L. Olson 1984. The birds of the Republic of Panamá, part 4. Smithsonian Miscellaneous Collections 150(4)., p. 79 (PDF p. 91).
Description
Wetmore et al. 1984 (Birds of Panama pt 4).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Rufous-backed Wren (Campylorhynchus capistratus) egg, 21.8 × 16.2 mm

Rufous-backed Wren

Campylorhynchus capistratus

  • 21.8 × 16.2 mm
Breeds in Mexico, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua

Creamy white, spotted and mottled olive-brown and lavender, indistinct cap at the broad end.

Sources of information

Size
Average of 8 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., p. 334.
Description
Oates & Reid 1905 (BM Egg Catalogue vol 4).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Rufous-breasted Wren (Pheugopedius rutilus) egg, 18.2 × 13.8 mm

Rufous-breasted Wren

Pheugopedius rutilus

  • 18.2 × 13.8 mm
  • Clutch: 3 eggs
Breeds in Costa Rica, Panama, Trinidad and Tobago, Colombia, Venezuela

White with a heavy wreath of brown spots round the thickest part and a sprinkling over the rest.

Sources of information

Size
Average of 3 eggs: Skutch, A. F. 1960. Life histories of Central American birds II. Pacific Coast Avifauna 34., p. 120.
Description
Skutch 1960 (Pacific Coast Avifauna 34).
Agrees with: Wetmore et al. 1984 (Birds of Panama pt 4).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Rufous-browed Wren (Troglodytes rufociliatus) egg, 18 × 13.5 mm

Rufous-browed Wren

Troglodytes rufociliatus

  • 18 × 13.5 mm
  • Clutch: 3 eggs
Breeds in Mexico, El Salvador, Guatemala, Honduras, Nicaragua

White, speckled all over with pale cinnamon-brown, heaviest in a wreath around the thicker end.

Sources of information

Size
Skutch, A. F. 1960. Life histories of Central American birds II. Pacific Coast Avifauna 34., p. 161.
Description
Skutch 1960, Life Histories of Central American Birds II (Pacific Coast Avifauna 34).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Russet-naped Wren (Campylorhynchus humilis) egg, 22 × 16 mm

Russet-naped Wren

Campylorhynchus humilis

  • 22 × 16 mm
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
Breeds in Mexico

No documented description found yet; drawn like the Veracruz Wren egg (same genus).

Sources of information

Size
Average of 8 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., p. 334.
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Santa Marta Wren (Troglodytes monticola) egg, 16.9 × 13 mm

Santa Marta Wren

Troglodytes monticola

  • 16.9 × 13 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Colombia

No documented description found yet; drawn like the Winter Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Troglodytes aedon, Troglodytes hiemalis, Troglodytes musculus, Troglodytes pacificus, Troglodytes rufociliatus ….
Description
Estimated, no description found: drawn like a related egg (Winter Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Sedge Wren (Cistothorus stellaris) egg, 16 × 12 mm

Sedge Wren

Cistothorus stellaris

  • 16 × 12 mm
  • Clutch: 3–8 eggs
Breeds in Canada, United States

White and unmarked.

Sources of information

Size
Average of 50 eggs: Bent, Life Histories of North American Nuthatches, Wrens, Thrashers, and Their Allies (U.S. National Museum Bulletin 195, 1948), p. 269.
Agrees with: Cornell Lab of Ornithology, All About Birds: Sedge Wren, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Sedge Wren, Life History.
Drawing checked against a photo: Bird Eggs of Canada photo (Royal Saskatchewan Museum).
Clutch
Cornell Lab of Ornithology, All About Birds.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Sepia-brown Wren (Cinnycerthia olivascens) egg, 18 × 13 mm

Sepia-brown Wren

Cinnycerthia olivascens

  • 18 × 13 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Colombia, Ecuador, Peru

No documented description found yet; drawn like the Winter Wren egg (same family).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Cinnycerthia unirufa.
Description
Estimated, no description found: drawn like a related egg (Winter Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Sinaloa Wren (Thryophilus sinaloa) egg, 20 × 13.5 mm

Sinaloa Wren

Thryophilus sinaloa

  • 20 × 13.5 mm (approx.)
Breeds in Mexico

Plain bluish white, unmarked.

Sources of information

Size
Nehrkorn, A. 1899. Katalog der Eiersammlung nebst Beschreibungen der aussereuropäischen Eier. Braunschweig.
Description
Nehrkorn 1899 (Katalog der Eiersammlung).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Slate-throated Gnatcatcher (Polioptila schistaceigula) egg, 14.3 × 11.5 mm

Slate-throated Gnatcatcher

Polioptila schistaceigula

  • 14.3 × 11.5 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Panama, Colombia, Ecuador

No documented description found yet; drawn like the Tropical Gnatcatcher egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Polioptila albiloris, Polioptila albiventris, Polioptila bilineata, Polioptila caerulea, Polioptila californica ….
Description
Estimated, no description found: drawn like a related egg (Tropical Gnatcatcher).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Socorro Wren (Troglodytes sissonii) egg, 16.9 × 13 mm

Socorro Wren

Troglodytes sissonii

  • 16.9 × 13 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Mexico

No documented description found yet; drawn like the Winter Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Troglodytes aedon, Troglodytes hiemalis, Troglodytes musculus, Troglodytes pacificus, Troglodytes rufociliatus ….
Description
Estimated, no description found: drawn like a related egg (Winter Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Song Wren (Cyphorhinus phaeocephalus) egg, 24 × 16.6 mm

Song Wren

Cyphorhinus phaeocephalus

  • 24 × 16.6 mm
  • Clutch: 2–3 eggs
Breeds in Costa Rica, Honduras, Nicaragua, Panama, Colombia, Ecuador

White, very finely and sparingly speckled with brown, forming a wreath about the thick end; some eggs almost unmarked.

Sources of information

Size
Average of 3 eggs: Wetmore, A., R. F. Pasquier & S. L. Olson 1984. The birds of the Republic of Panamá, part 4. Smithsonian Miscellaneous Collections 150(4)., p. 120.
Description
Skutch 1960 (Pacific Coast Avifauna 34).
Agrees with: Wetmore et al. 1984 (Birds of Panama pt 4).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Sooty-headed Wren (Pheugopedius spadix) egg, 20.2 × 14.5 mm

Sooty-headed Wren

Pheugopedius spadix

  • 20.2 × 14.5 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Panama, Colombia

No documented description found yet; drawn like the Moustached Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Pheugopedius coraya, Pheugopedius felix, Pheugopedius genibarbis, Pheugopedius maculipectus, Pheugopedius rutilus.
Description
Estimated, no description found: drawn like a related egg (Moustached Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Southern Chestnut-breasted Wren (Cyphorhinus thoracicus) egg, 24 × 16.6 mm

Southern Chestnut-breasted Wren

Cyphorhinus thoracicus

  • 24 × 16.6 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Bolivia, Colombia, Ecuador, Peru

No documented description found yet; drawn like the Song Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Cyphorhinus phaeocephalus.
Description
Estimated, no description found: drawn like a related egg (Song Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Southern House Wren (Troglodytes musculus) egg, 17.8 × 13.4 mm

Southern House Wren

Troglodytes musculus

  • 17.8 × 13.4 mm
  • Clutch: 3–4 eggs
Breeds in Mexico, Central America (7 countries), Trinidad and Tobago and South America (13 countries)
show all 22Mexico: Mexico
Central America: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama
The Caribbean: Trinidad and Tobago
South America: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela

Whitish (greyish or pinkish white), densely flecked all over with fine brown, reddish-brown and cinnamon, sometimes heaviest at the thick end; slightly glossy.

Sources of information

Size
Average of 39 eggs: Skutch, A. F. 1953. Life history of the Southern House Wren. Condor 55: 121-149, p. 125.
Description
Skutch, A. F. 1960. Life Histories of Central American Birds II. Pacific Coast Avifauna 34; supporting: Hellebrekers, W. P. J. 1942. Revision of the Penard oölogical collection from Surinam. Zool. Meded. 24.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Southern Nightingale-Wren (Microcerculus marginatus) egg, 22.6 × 18 mm

Southern Nightingale-Wren

Microcerculus marginatus

  • 22.6 × 18 mm (approx.)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
Breeds in Costa Rica, Panama, Bolivia, Brazil, Colombia, Ecuador, Peru, Venezuela

No documented description found yet; drawn like the Veracruz Wren egg (same family).

Sources of information

Size
Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., p. 347.
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Speckle-breasted Wren (Pheugopedius sclateri) egg, 20.2 × 14.5 mm

Speckle-breasted Wren

Pheugopedius sclateri

  • 20.2 × 14.5 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Colombia, Ecuador, Peru

No documented description found yet; drawn like the Moustached Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Pheugopedius coraya, Pheugopedius felix, Pheugopedius genibarbis, Pheugopedius maculipectus, Pheugopedius rutilus.
Description
Estimated, no description found: drawn like a related egg (Moustached Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Spot-breasted Wren (Pheugopedius maculipectus) egg, 20 × 15 mm

Spot-breasted Wren

Pheugopedius maculipectus

  • 20 × 15 mm (approx.)
Breeds in Mexico, Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua

White, unmarked, very thin-shelled.

Sources of information

Size
Nehrkorn, A. 1899. Katalog der Eiersammlung nebst Beschreibungen der aussereuropäischen Eier. Braunschweig.
Description
Nehrkorn 1899 (Katalog der Eiersammlung).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Spotted Wren (Campylorhynchus gularis) egg, 23 × 16.5 mm

Spotted Wren

Campylorhynchus gularis

  • 23 × 16.5 mm
  • Clutch: 2–3 eggs
Breeds in Mexico

Beige-buff, densely spotted reddish-brown to brown, denser at the large end forming a ring.

Sources of information

Size
Average of 5 eggs: Ceja-Madrigal A & Salgado-Ortiz J 2013, Descripción del nido y huevos de la matraca serrana (Campylorhynchus gularis). Huitzil 14(2): 113-116.
Description
Ceja-Madrigal A & Salgado-Ortiz J 2013, Descripción del nido y huevos de la matraca serrana (Campylorhynchus gularis). Huitzil 14(2): 113-116; supporting: Ceja-Madrigal, A. & Salgado-Ortiz, J. 2013. Huitzil 14(2): 113-116.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Stripe-backed Wren (Campylorhynchus nuchalis) egg, 25.6 × 16.4 mm

Stripe-backed Wren

Campylorhynchus nuchalis

  • 25.6 × 16.4 mm
Breeds in Colombia, Venezuela

Sandy brown, covered all over with small, slightly darker sandy-brown dots.

Sources of information

Size
Average of 4 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., p. 335.
Description
Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., pdf p. 14.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Stripe-breasted Wren (Cantorchilus thoracicus) egg, 20.3 × 14 mm

Stripe-breasted Wren

Cantorchilus thoracicus

  • 20.3 × 14 mm
Breeds in Honduras, Panama

Immaculate white, slightly glossy.

Sources of information

Size
Average of 3 eggs: Skutch, A. F. 1972. Studies of tropical American birds. Publications of the Nuttall Ornithological Club 10. Cambridge, Mass., p. 161.
Description
Skutch, A. F. 1972. Studies of tropical American birds. Publications of the Nuttall Ornithological Club 10. Cambridge, Mass., p. 161.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Stripe-throated Wren (Cantorchilus leucopogon) egg, 20.6 × 15 mm

Stripe-throated Wren

Cantorchilus leucopogon

  • 20.6 × 15 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Panama, Colombia, Ecuador

No documented description found yet; drawn like the Buff-breasted Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Cantorchilus leucotis, Cantorchilus longirostris, Cantorchilus modestus, Cantorchilus nigricapillus, Cantorchilus semibadius ….
Description
Estimated, no description found: drawn like a related egg (Buff-breasted Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Sumichrast's Wren (Hylorchilus sumichrasti) egg, 20.4 × 14.9 mm

Sumichrast's Wren

Hylorchilus sumichrasti

  • 20.4 × 14.9 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Mexico

No documented description found yet; drawn like the Veracruz Wren egg (same family).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same family: Campylorhynchus brunneicapillus, Campylorhynchus capistratus, Campylorhynchus chiapensis, Campylorhynchus fasciatus, Campylorhynchus griseus ….
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Superciliated Wren (Cantorchilus superciliaris) egg, 20.3 × 14.8 mm

Superciliated Wren

Cantorchilus superciliaris

  • 20.3 × 14.8 mm
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
Breeds in Ecuador, Peru

No documented description found yet; drawn like the Stripe-breasted Wren egg (same genus).

Sources of information

Size
Average of 2 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., p. 343.
Description
Estimated, no description found: drawn like a related egg (Stripe-breasted Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Tawny-faced Gnatwren (Microbates cinereiventris) egg, 18.65 × 14 mm

Tawny-faced Gnatwren

Microbates cinereiventris

  • 18.65 × 14 mm
  • Clutch: 2 eggs
Breeds in Costa Rica, Nicaragua, Panama, Bolivia, Colombia, Ecuador, Peru

White with a liberal sprinkling of fine reddish-brown and dark brown spots over the whole surface, slightly denser at the large end.

Sources of information

Size
Average of 2 eggs: Kiff, L. F. 1977 (Condor 79: 261-262), quoted in Wetmore, A., R. F. Pasquier & S. L. Olson 1984. The birds of the Republic of Panamá, part 4. Smithsonian Miscellaneous Collections 150(4)., p. 189.
Description
Wetmore, A., Pasquier, R. F. & Olson, S. L. 1984. The Birds of the Republic of Panama, pt 4. Smithsonian Misc. Coll. 150.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Tepui Wren (Troglodytes rufulus) egg, 16.9 × 13 mm

Tepui Wren

Troglodytes rufulus

  • 16.9 × 13 mm (estimated)
  • Speculative: we haven't found documented measurements of this egg yet, so we estimated its size from related birds.
Breeds in Brazil, Guyana, Venezuela

Pinkish white, thickly speckled with red-brown (like the House Wren).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Troglodytes aedon, Troglodytes hiemalis, Troglodytes musculus, Troglodytes pacificus, Troglodytes rufociliatus ….
Description
Nehrkorn 1899 (Katalog der Eiersammlung).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Thrush-like Wren (Campylorhynchus turdinus) egg, 23.1 × 16.5 mm

Thrush-like Wren

Campylorhynchus turdinus

  • 23.1 × 16.5 mm
Breeds in Argentina, Bolivia, Brazil, Colombia, Ecuador, Paraguay, Peru

Reddish-white ground with very faint small grey-brown spots.

Sources of information

Size
Average of 11 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 19. Akademie-Verlag, Berlin., p. 335.
Description
Nehrkorn 1899 (Katalog der Eiersammlung).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Timberline Wren (Thryorchilus browni) egg, 20.4 × 14.9 mm

Timberline Wren

Thryorchilus browni

  • 20.4 × 14.9 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Costa Rica, Panama

No documented description found yet; drawn like the Veracruz Wren egg (same family).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same family: Campylorhynchus brunneicapillus, Campylorhynchus capistratus, Campylorhynchus chiapensis, Campylorhynchus fasciatus, Campylorhynchus griseus ….
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Tooth-billed Wren (Odontorchilus cinereus) egg, 20.4 × 14.9 mm

Tooth-billed Wren

Odontorchilus cinereus

  • 20.4 × 14.9 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Bolivia, Brazil

No documented description found yet; drawn like the Veracruz Wren egg (same family).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same family: Campylorhynchus brunneicapillus, Campylorhynchus capistratus, Campylorhynchus chiapensis, Campylorhynchus fasciatus, Campylorhynchus griseus ….
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Trilling Gnatwren (Ramphocaenus melanurus) egg, 19.45 × 13.9 mm

Trilling Gnatwren

Ramphocaenus melanurus

  • 19.45 × 13.9 mm
  • Clutch: 2 eggs
Breeds in Mexico, Central America (7 countries), Trinidad and Tobago and South America (9 countries)
show all 18Mexico: Mexico
Central America: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama
The Caribbean: Trinidad and Tobago
South America: Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela

White, lightly sprinkled with fine pale cinnamon spots over the whole surface, heaviest at the thick end.

Sources of information

Size
Skutch 1960 (Pac. Coast Avif. 34), quoted in Wetmore, A., R. F. Pasquier & S. L. Olson 1984. The birds of the Republic of Panamá, part 4. Smithsonian Miscellaneous Collections 150(4)., p. 185.
Description
Skutch 1960 (Pac. Coast Avif. 34, pp. 54-61), quoted in Wetmore, A., R. F. Pasquier & S. L. Olson 1984. The birds of the Republic of Panamá, part 4. Smithsonian Miscellaneous Collections 150(4)., pp. 185-186.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Tropical Gnatcatcher (Polioptila plumbea) egg, 14.4 × 11.7 mm

Tropical Gnatcatcher

Polioptila plumbea

  • 14.4 × 11.7 mm (approx.)
  • Clutch: 2–3 eggs
Breeds in Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela

White, finely speckled all over with brown.

Sources of information

Size
Wetmore, A., R. F. Pasquier & S. L. Olson 1984. The birds of the Republic of Panamá, part 4. Smithsonian Miscellaneous Collections 150(4)., p. 181.
Description
Wetmore, A., Pasquier, R. F. & Olson, S. L. 1984. The Birds of the Republic of Panama, part 4.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Veracruz Wren (Campylorhynchus rufinucha) egg, 23.1 × 16.4 mm

Veracruz Wren

Campylorhynchus rufinucha

  • 23.1 × 16.4 mm (estimated)
  • Speculative: we haven't found documented measurements of this egg yet, so we estimated its size from related birds.
  • Clutch: 3–6 eggs
Breeds in Mexico

White or faintly buffy white, heavily sprinkled with small brown and lilac spots, usually densest at the larger end, sometimes as a wreath.

Sources of information

Size
Dickey, D. R. & A. J. van Rossem. 1938. The birds of El Salvador. Field Museum of Natural History, Zoological Series 23., p. 432 or 433 (page number inferred from scan position; account heading p. 430 per index).
Description
Dickey, D. R. & A. J. van Rossem. 1938. The birds of El Salvador. Field Museum of Natural History, Zoological Series 23., p. 432 or 433 (inferred).
Agrees with: Skutch, A. F. 1940. Social and sleeping habits of Central American wrens. Auk 57: 293-312., p. 310.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Whiskered Wren (Pheugopedius mystacalis) egg, 20.2 × 14.5 mm

Whiskered Wren

Pheugopedius mystacalis

  • 20.2 × 14.5 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Colombia, Ecuador, Venezuela

No documented description found yet; drawn like the Moustached Wren egg (same genus).

Sources of information

Size
Stoddard, M. C., et al. 2017. Avian egg shape: form, function, and evolution. Science 356: 1249-1254 (Data S1, MVZ egg collection).
Description
Estimated, no description found: drawn like a related egg (Moustached Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a White-bellied Wren (Uropsila leucogastra) egg, 20.4 × 14.9 mm

White-bellied Wren

Uropsila leucogastra

  • 20.4 × 14.9 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Mexico, Belize, Guatemala, Honduras

No documented description found yet; drawn like the Veracruz Wren egg (same family).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same family: Campylorhynchus brunneicapillus, Campylorhynchus capistratus, Campylorhynchus chiapensis, Campylorhynchus fasciatus, Campylorhynchus griseus ….
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a White-breasted Wood Wren (Henicorhina leucosticta) egg, 21.9 × 14.7 mm

White-breasted Wood Wren

Henicorhina leucosticta

  • 21.9 × 14.7 mm
  • Clutch: 2 eggs
Breeds in Mexico, Central America (6 countries) and South America (8 countries)
show all 15Mexico: Mexico
Central America: Belize, Costa Rica, Guatemala, Honduras, Nicaragua, Panama
South America: Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela

Pure white, glossy, unmarked (rarely a very few light brown specks).

Sources of information

Size
Average of 5 eggs: Skutch, A. F. 1960. Life histories of Central American birds II. Pacific Coast Avifauna 34., p. 143.
Agrees with: Huber 1932, quoted in Wetmore, A., R. F. Pasquier & S. L. Olson 1984. The birds of the Republic of Panamá, part 4. Smithsonian Miscellaneous Collections 150(4)., p. 112-113.
Description
Skutch, A. F. 1960. Life Histories of Central American Birds II. Pacific Coast Avifauna 34.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a White-browed Gnatcatcher (Polioptila bilineata) egg, 14.3 × 11.9 mm

White-browed Gnatcatcher

Polioptila bilineata

  • 14.3 × 11.9 mm
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
Breeds in Mexico, Belize, Costa Rica, Guatemala, Honduras, Nicaragua, Panama

No documented description found yet; drawn like the Tropical Gnatcatcher egg (same genus).

Sources of information

Size
Average of 5 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 21–28. Akademie-Verlag, Berlin., p. 653.
Description
Estimated, no description found: drawn like a related egg (Tropical Gnatcatcher).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a White-headed Wren (Campylorhynchus albobrunneus) egg, 23.1 × 16.4 mm

White-headed Wren

Campylorhynchus albobrunneus

  • 23.1 × 16.4 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Panama, Colombia

No documented description found yet; drawn like the Veracruz Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Campylorhynchus brunneicapillus, Campylorhynchus capistratus, Campylorhynchus chiapensis, Campylorhynchus fasciatus, Campylorhynchus griseus ….
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a White-lored Gnatcatcher (Polioptila albiloris) egg, 14.2 × 11.7 mm

White-lored Gnatcatcher

Polioptila albiloris

  • 14.2 × 11.7 mm (approx.)
Breeds in Mexico, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua

Pale bluish-white, finely spotted reddish-brown, mainly toward the larger end (as Blue-grey Gnatcatcher).

Sources of information

Size
Oates, E. W. & S. G. Reid 1903. Catalogue of the Collection of Birds' Eggs in the British Museum, vol. 3. London., p. 271.
Description
Oates & Reid 1903 (BM Egg Catalogue vol 3).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Wing-banded Wren (Microcerculus bambla) egg, 22.6 × 18 mm

Wing-banded Wren

Microcerculus bambla

  • 22.6 × 18 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela

No documented description found yet; drawn like the Veracruz Wren egg (same family).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Microcerculus marginatus.
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Winter Wren (Troglodytes hiemalis) egg, 16.7 × 12.5 mm

Winter Wren

Troglodytes hiemalis

  • 16.7 × 12.5 mm
  • Clutch: 1–9 eggs
Breeds in Canada, United States

White with small pale to reddish brown spots concentrated on the larger end of the egg.

Sources of information

Size
Average of 40 eggs: Bent, Life Histories of North American Nuthatches, Wrens, Thrashers, and Their Allies (U.S. National Museum Bulletin 195, 1948), p. 151.
Agrees with: Cornell Lab of Ornithology, All About Birds: Winter Wren, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Winter Wren, Life History.
Drawing checked against a photo: Bird Eggs of Canada photo (Royal Ontario Museum).
Clutch
Cornell Lab of Ornithology, All About Birds.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Yucatan Gnatcatcher (Polioptila albiventris) egg, 14.2 × 11.7 mm

Yucatan Gnatcatcher

Polioptila albiventris

  • 14.2 × 11.7 mm
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
Breeds in Mexico

No documented description found yet; drawn like the White-lored Gnatcatcher egg (same genus).

Sources of information

Size
Average of 5 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 21–28. Akademie-Verlag, Berlin., p. 653.
Description
Estimated, no description found: drawn like a related egg (White-lored Gnatcatcher).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Yucatan Wren (Campylorhynchus yucatanicus) egg, 23.1 × 16.4 mm

Yucatan Wren

Campylorhynchus yucatanicus

  • 23.1 × 16.4 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Mexico

No documented description found yet; drawn like the Veracruz Wren egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Campylorhynchus brunneicapillus, Campylorhynchus capistratus, Campylorhynchus chiapensis, Campylorhynchus fasciatus, Campylorhynchus griseus ….
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Illustration of a Zapata Wren (Ferminia cerverai) egg, 20.4 × 14.9 mm

Zapata Wren

Ferminia cerverai

  • 20.4 × 14.9 mm (estimated)
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings and its size from related birds.
Breeds in Caribbean islands

No documented description found yet; drawn like the Veracruz Wren egg (same family).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same family: Campylorhynchus brunneicapillus, Campylorhynchus capistratus, Campylorhynchus chiapensis, Campylorhynchus fasciatus, Campylorhynchus griseus ….
Description
Estimated, no description found: drawn like a related egg (Veracruz Wren).
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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Make a 3D-printable copy of this egg