55 eggs at true relative size, from the 55.2 mm egg of the East Brazilian Chachalaca to the 92.16 mm egg of the Great Curassow.
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.
Andean Guan
Penelope montagnii
- 70.5 × 49.2 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.
No documented description found yet; drawn like the Crested Guan egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Penelope bridgesi, Penelope dabbenei, Penelope jacquacu, Penelope jacucaca, Penelope marail ….
- Description
- Estimated, no description found: drawn like a related egg (Crested Guan).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Band-tailed Guan
Penelope argyrotis
- 70.5 × 49.2 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.
No documented description found yet; drawn like the Crested Guan egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Penelope bridgesi, Penelope dabbenei, Penelope jacquacu, Penelope jacucaca, Penelope marail ….
- Description
- Estimated, no description found: drawn like a related egg (Crested Guan).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Bare-faced Curassow
Crax fasciolata
- 86 × 59 mm (approx.)
- Clutch: 2 eggs
White, rough-shelled, unmarked.
Sources of information
- Size
- Nehrkorn, A. 1899. Katalog der Eiersammlung nebst Beschreibungen der aussereuropäischen Eier. Braunschweig.
- Description
- de la Peña 2025 (Aves Argentinas tomo 1).
Drawing checked against a photo: de la Peña 2025, Aves Argentinas tomo 1, p. 287. - 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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Baudo Guan
Penelope ortoni
- 70.5 × 49.2 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.
No documented description found yet; drawn like the Crested Guan egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Penelope bridgesi, Penelope dabbenei, Penelope jacquacu, Penelope jacucaca, Penelope marail ….
- Description
- Estimated, no description found: drawn like a related egg (Crested Guan).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Bearded Guan
Penelope barbata
- 70.5 × 49.2 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.
No documented description found yet; drawn like the Crested Guan egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Penelope bridgesi, Penelope dabbenei, Penelope jacquacu, Penelope jacucaca, Penelope marail ….
- Description
- Estimated, no description found: drawn like a related egg (Crested Guan).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Black Curassow
Crax alector
- 83.3 × 60.5 mm
- Clutch: 3 eggs
Dull buffy to olive-tinged white, rough-shelled and lustreless, often stained.
Sources of information
- Size
- Average of 3 eggs: Hellebrekers, W. P. J. 1942. Revision of the Penard oölogical collection from Surinam. Zoologische Mededelingen 24: 240–275., p. 245.
- Description
- Hauber, M.E. (ed.) 2014. The Book of Eggs. University of Chicago Press, p. 218; supporting: Hellebrekers, W.Ph.J. 1942. Revision of the Penard oölogical collection from Surinam. Zoologische Mededelingen 24.
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Know something more about this egg, or spotted a mistake? Message us.
Black Guan
Chamaepetes unicolor
- 72 × 51.1 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.
No documented description found yet; drawn like the Sickle-winged Guan egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Chamaepetes goudotii.
- Description
- Estimated, no description found: drawn like a related egg (Sickle-winged Guan).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Black-fronted Piping Guan
Pipile jacutinga
- 73 × 52.2 mm
- Clutch: 3 eggs
White, unmarked.
Sources of information
- Size
- Average of 8 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 206.
- Description
- de la Peña 2025 (Aves Argentinas tomo 1).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Know something more about this egg, or spotted a mistake? Message us.
Blue-billed Curassow
Crax alberti
- 89.8 × 64.3 mm
- Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
No documented description found yet; drawn like the Yellow-knobbed Curassow egg (same genus).
Sources of information
- Size
- Average of 3 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 204.
- Description
- Estimated, no description found: drawn like a related egg (Yellow-knobbed Curassow).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Blue-throated Piping Guan
Pipile cumanensis
- 69 × 49.2 mm
show all 10
South America: Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, Suriname, VenezuelaDull white, smooth-shelled with very dense deep pores, unmarked.
Sources of information
- Size
- Average of 6 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 206.
- 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).
Know something more about this egg, or spotted a mistake? Message us.
Buff-browed Chachalaca
Ortalis superciliaris
- 59.8 × 40.9 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.
No documented description found yet; drawn like the West Mexican Chachalaca egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Ortalis araucuan, Ortalis canicollis, Ortalis erythroptera, Ortalis garrula, Ortalis guttata ….
- Description
- Estimated, no description found: drawn like a related egg (West Mexican Chachalaca).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Cauca Guan
Penelope perspicax
- 74.9 × 49.2 mm
White to cream, smooth, unmarked.
Sources of information
- Size
- Average of 2 eggs: Ríos, M.M., Muñoz, M.C. & Londoño, G.A. 2006. Historia natural de la pava caucana (Penelope perspicax). Ornitología Colombiana 4: 16-27.
- Description
- Ríos, M.M., Muñoz, M.C. & Londoño, G.A. 2006. Historia natural de la pava caucana (Penelope perspicax). Ornitología Colombiana 4: 16-27.
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Know something more about this egg, or spotted a mistake? Message us.
Chaco Chachalaca
Ortalis canicollis
- 62.8 × 43 mm
- Clutch: 4 eggs
White, rough-shelled, unmarked.
Sources of information
- Size
- Average of 48 eggs: de la Peña, M. R. 2025. Aves Argentinas: descripción, comportamiento, reproducción y distribución. Comunicaciones del Museo Provincial de Ciencias Naturales "Florentino Ameghino" (Nueva Serie). Santa Fe., tomo 1, p. 282.
- Description
- de la Peña 2025 (Aves Argentinas tomo 1).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Know something more about this egg, or spotted a mistake? Message us.
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Chestnut-bellied Guan
Penelope ochrogaster
- 70.5 × 49.2 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.
No documented description found yet; drawn like the Crested Guan egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Penelope bridgesi, Penelope dabbenei, Penelope jacquacu, Penelope jacucaca, Penelope marail ….
- Description
- Estimated, no description found: drawn like a related egg (Crested Guan).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Chestnut-headed Chachalaca
Ortalis ruficeps
- 59.8 × 40.9 mm (estimated)
- Speculative: we haven't found a description of this egg (a source we checked reports it as undescribed), so we estimated its colours and markings and its size from related birds.
No documented description found yet; drawn like the West Mexican Chachalaca egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Ortalis araucuan, Ortalis canicollis, Ortalis erythroptera, Ortalis garrula, Ortalis guttata ….
- Description
- Estimated, no description found: drawn like a related egg (West Mexican Chachalaca).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Chestnut-winged Chachalaca
Ortalis garrula
- 59.8 × 40.8 mm
- Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
Pale creamy white, unmarked, with a conspicuously granular shell.
Sources of information
- Size
- Average of 5 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 206.
- Description
- Todd, W. E. C. & M. A. Carriker Jr. 1922. The birds of the Santa Marta region of Colombia: a study in altitudinal distribution. Annals of the Carnegie Museum 14., p. 171.
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Colombian Chachalaca
Ortalis columbiana
- 59.8 × 40.9 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.
No documented description found yet; drawn like the West Mexican Chachalaca egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Ortalis araucuan, Ortalis canicollis, Ortalis erythroptera, Ortalis garrula, Ortalis guttata ….
- Description
- Estimated, no description found: drawn like a related egg (West Mexican Chachalaca).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Crested Guan
Penelope purpurascens
- 71 × 49.15 mm (approx.)
- Clutch: 2 eggs
show all 12
Mexico: MexicoCentral America: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama
South America: Colombia, Ecuador, Peru, Venezuela
Unmarked dull white to faintly creamy white, with the roughened, finely pitted shell typical of cracids.
Sources of information
- Size
- Wetmore, A. 1965. The birds of the Republic of Panamá, part 1 (Tinamidae to Rynchopidae). Smithsonian Miscellaneous Collections 150(1)., p. 302.
- Description
- Wetmore, A. 1965. The Birds of the Republic of Panamá. Part 1. Smithsonian Miscellaneous Collections 150(1)., p. 302.
Agrees with: Leopold, A. S. 1959. Wildlife of Mexico: the Game Birds and Mammals. University of California Press., p. 208; Neotropical Birds Online (historic account), Crested Guan, Breeding (Cornell Lab of Ornithology). - 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).
Know something more about this egg, or spotted a mistake? Message us.
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Crestless Curassow
Mitu tomentosum
- 86 × 63 mm
White, unmarked, with a rough shell.
Sources of information
- Size
- Average of 4 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 204.
- Description
- Penard, F. P. & A. P. Penard 1908. De vogels van Guyana (Suriname, Cayenne en Demerara), deel 1. Paramaribo., p. 299.
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Know something more about this egg, or spotted a mistake? Message us.
Dusky-legged Guan
Penelope obscura
- 70 × 47.9 mm
- Clutch: 2–3 eggs
White, unmarked; shell slightly rough, almost smooth.
Sources of information
- Size
- Average of 11 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 205.
- Description
- de la Peña 2025 (Aves Argentinas tomo 1).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Know something more about this egg, or spotted a mistake? Message us.
East Brazilian Chachalaca
Ortalis araucuan
- 55.2 × 35 mm
- Clutch: 3 eggs
White (stained green by the decaying leaves lining the nest).
Sources of information
- Size
- Average of 3 eggs: Studer & Crozariol 2022, New breeding information on Brazilian birds 1, Bull. B.O.C. 142(4): 410–465, p. 452.
- Description
- Studer & Crozariol 2022, New breeding information on Brazilian birds 1, Bull. B.O.C. 142(4): 410–465, p. 452.
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Know something more about this egg, or spotted a mistake? Message us.
Great Curassow
Crax rubra
- 92.16 × 65.64 mm
- Clutch: 2 eggs
show all 10
Mexico: MexicoCentral America: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama
South America: Colombia, Ecuador
Creamy white, unmarked, with a roughened, pitted, lustreless shell.
Sources of information
- Size
- Wetmore, A. 1965. The birds of the Republic of Panamá, part 1 (Tinamidae to Rynchopidae). Smithsonian Miscellaneous Collections 150(1)., p. 297.
- Description
- Wetmore 1965, The Birds of the Republic of Panama, Part 1 (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).
Know something more about this egg, or spotted a mistake? Message us.
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Grey-headed Chachalaca
Ortalis cinereiceps
- 59.8 × 40.9 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.
Dull white, unmarked.
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Ortalis araucuan, Ortalis canicollis, Ortalis erythroptera, Ortalis garrula, Ortalis guttata ….
- Description
- del Hoyo, J. & Kirwan, G.M. 2020. Gray-headed Chachalaca (Ortalis cinereiceps), v1.0. Birds of the World. doi:10.2173/bow.grhcha1.01 (via Wikipedia).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Helmeted Curassow
Pauxi pauxi
- 87.7 × 62.4 mm
Dull white, coarse granulated shell, glossless, unmarked.
Sources of information
- Size
- Average of 10 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 204.
- Description
- Oates 1901 (BM Egg Catalogue vol 1).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Know something more about this egg, or spotted a mistake? Message us.
Highland Guan
Penelopina nigra
- 88.2 × 64.5 mm
- Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
No documented description found yet; drawn like the Crested Guan egg (same family).
Sources of information
- Size
- Average of 20 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 204.
- Description
- Estimated, no description found: drawn like a related egg (Crested Guan).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Horned Curassow
Pauxi unicornis
- 87.7 × 62.4 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.
No documented description found yet; drawn like the Helmeted Curassow egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Pauxi pauxi.
- Description
- Estimated, no description found: drawn like a related egg (Helmeted Curassow).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Horned Guan
Oreophasis derbianus
- 73.8 × 50.6 mm
- Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
No documented description found yet; drawn like the Crested Guan egg (same family).
Sources of information
- Size
- Average of 2 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 206.
- Description
- Estimated, no description found: drawn like a related egg (Crested Guan).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Little Chachalaca
Ortalis motmot
- 61.8 × 42.9 mm
Dull white, coarse-grained and rough, glossless.
Sources of information
- Size
- Average of 8 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 205.
- 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).
Know something more about this egg, or spotted a mistake? Message us.
Marail Guan
Penelope marail
- 66.3 × 49 mm
Smooth white, unmarked.
Sources of information
- Size
- Average of 6 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 204.
- Description
- Penard, F. P. & A. P. Penard 1908. De vogels van Guyana (Suriname, Cayenne en Demerara), deel 1. Paramaribo., p. 303.
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Know something more about this egg, or spotted a mistake? Message us.
Nocturnal Curassow
Nothocrax urumutum
- 71 × 52.3 mm
- Speculative: we haven't found a description of this egg (a source we checked reports it as undescribed), so we estimated its colours and markings from related birds.
No documented description found yet; drawn like the Crested Guan egg (same family).
Sources of information
- Size
- Average of 7 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 204.
- Description
- Estimated, no description found: drawn like a related egg (Crested Guan).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Plain Chachalaca
Ortalis vetula
- 58.4 × 40.9 mm
- Clutch: 2–4 eggs
Buffy white.
Sources of information
- Size
- Average of 56 eggs: Bent, Life Histories of North American Gallinaceous Birds (U.S. National Museum Bulletin 162, 1932), p. 348.
- Description
- Cornell Lab of Ornithology, All About Birds: Plain Chachalaca, 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).
Know something more about this egg, or spotted a mistake? Message us.
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Razor-billed Curassow
Mitu tuberosum
- 90 × 60 mm (approx.)
White, unmarked, oval, rough-shelled.
Sources of information
- Size
- Penard, F. P. & A. P. Penard 1908. De vogels van Guyana (Suriname, Cayenne en Demerara), deel 1. Paramaribo., p. 298.
- Description
- Penard, F. P. & A. P. Penard 1908. De vogels van Guyana (Suriname, Cayenne en Demerara), deel 1. Paramaribo., p. 298.
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Know something more about this egg, or spotted a mistake? Message us.
Red-billed Curassow
Crax blumenbachii
- 87.5 × 60.2 mm
- Clutch: 2–4 eggs
Pure white, rough and granular, dull.
Sources of information
- Size
- Average of 14 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 204.
- Description
- Euler 1900 (Revista do Museu Paulista 4); 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).
Know something more about this egg, or spotted a mistake? Message us.
Red-faced Guan
Penelope dabbenei
- 70 × 50 mm (approx.)
- Clutch: 3 eggs
White, unmarked.
Sources of information
- Size
- de la Peña, M. R. 2025. Aves Argentinas: descripción, comportamiento, reproducción y distribución. Comunicaciones del Museo Provincial de Ciencias Naturales "Florentino Ameghino" (Nueva Serie). Santa Fe., tomo 1, p. 273.
- Description
- de la Peña 2025 (Aves Argentinas tomo 1).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Know something more about this egg, or spotted a mistake? Message us.
Red-throated Piping Guan
Pipile cujubi
- 73 × 50.3 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.
No documented description found yet; drawn like the Black-fronted Piping Guan egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Pipile cumanensis, Pipile jacutinga, Pipile pipile.
- Description
- Estimated, no description found: drawn like a related egg (Black-fronted Piping Guan).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Rufous-bellied Chachalaca
Ortalis wagleri
- 66.3 × 46.2 mm
- Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
No documented description found yet; drawn like the Rufous-vented Chachalaca egg (same genus).
Sources of information
- Size
- Average of 2 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 205.
- Description
- Estimated, no description found: drawn like a related egg (Rufous-vented Chachalaca).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Rufous-headed Chachalaca
Ortalis erythroptera
- 61.6 × 44.8 mm
- Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
No documented description found yet; drawn like the Little Chachalaca egg (same genus).
Sources of information
- Size
- Average of 3 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 206.
- Description
- Estimated, no description found: drawn like a related egg (Little Chachalaca).
- 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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Rufous-vented Chachalaca
Ortalis ruficauda
- 65 × 44 mm
Dull white, coarse granulated shell, glossless, unmarked.
Sources of information
- Size
- Average of 7 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 206.
- Description
- Oates 1901 (BM Egg Catalogue vol 1).
- 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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Rusty-margined Guan
Penelope superciliaris
- 63.7 × 44.9 mm
- Clutch: 3 eggs
White, rough-shelled, unmarked.
Sources of information
- Size
- Average of 14 eggs: Studer & Crozariol 2022, New breeding information on Brazilian birds 1, Bull. B.O.C. 142(4): 410–465, p. 449.
- Description
- de la Peña 2025 (Aves Argentinas tomo 1).
- 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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Salvin's Curassow
Mitu salvini
- 88 × 61.5 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.
No documented description found yet; drawn like the Crestless Curassow egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Mitu tomentosum, Mitu tuberosum.
- Description
- Estimated, no description found: drawn like a related egg (Crestless Curassow).
- 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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Scaled Chachalaca
Ortalis squamata
- 59.8 × 40.9 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.
No documented description found yet; drawn like the West Mexican Chachalaca egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Ortalis araucuan, Ortalis canicollis, Ortalis erythroptera, Ortalis garrula, Ortalis guttata ….
- Description
- Estimated, no description found: drawn like a related egg (West Mexican Chachalaca).
- 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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Sickle-winged Guan
Chamaepetes goudotii
- 72 × 51.1 mm
Dull white, coarse granulated shell, glossless, unmarked.
Sources of information
- Size
- Average of 7 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 206.
- Description
- Oates 1901 (BM Egg Catalogue vol 1).
- 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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Sira Curassow
Pauxi koepckeae
- 87.7 × 62.4 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.
No documented description found yet; drawn like the Helmeted Curassow egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Pauxi pauxi.
- Description
- Estimated, no description found: drawn like a related egg (Helmeted Curassow).
- 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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Speckled Chachalaca
Ortalis guttata
- 57.5 × 40 mm
Creamy white, rough-shelled, unmarked.
Sources of information
- Size
- Average of 16 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 205.
- 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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Spix's Guan
Penelope jacquacu
- 66.9 × 47.6 mm
White, lightly flecked with beige.
Sources of information
- Size
- Average of 6 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., pp. 204, 205.
- Description
- Amigo, X. 2024. Primer registro de depredación de nidos de Pava de Spix Penelope jacquacu (Cracidae) por el capuchino de frente blanca de Humboldt (Cebus yuracus). Revista Ecuatoriana de Ornitología 10(1): 1-6 (citing Leite 2015).
- 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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Trinidad Piping Guan
Pipile pipile
- 75.6 × 50.3 mm
- Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
No documented description found yet; drawn like the Black-fronted Piping Guan egg (same genus).
Sources of information
- Size
- Average of 2 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 206.
- Description
- Estimated, no description found: drawn like a related egg (Black-fronted Piping Guan).
- 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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Wattled Curassow
Crax globulosa
- 85 × 60 mm (approx.)
White, rough-shelled, unmarked.
Sources of information
- Size
- Nehrkorn, A. 1899. Katalog der Eiersammlung nebst Beschreibungen der aussereuropäischen Eier. Braunschweig.
- 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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Wattled Guan
Aburria aburri
- 69.2 × 49.5 mm (approx.)
Dull white, rough, with a thick chalky layer; glossless.
Sources of information
- Size
- Oates, E. W. 1901. Catalogue of the Collection of Birds' Eggs in the British Museum, vol. 1. London., p. 22.
- Description
- Nehrkorn 1899 (Katalog der Eiersammlung); supporting: Oates 1901 (BM Egg Catalogue vol 1).
- 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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West Mexican Chachalaca
Ortalis poliocephala
- 58 × 40.1 mm
Off-white, unmarked.
Sources of information
- Size
- Average of 2 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 205.
- Description
- Rodríguez-Flores, C. & Arizmendi, M.C. 2014. West Mexican Chachalaca (Ortalis poliocephala), Neotropical Birds Online (historic account), Cornell Lab of Ornithology; citing Rowley 1984/1985 and González-García et al. 2001.
- 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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White-bellied Chachalaca
Ortalis leucogastra
- 58.8 × 39.5 mm (approx.)
- Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
No documented description found yet; drawn like the West Mexican Chachalaca egg (same genus).
Sources of information
- Size
- Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 206.
- Description
- Estimated, no description found: drawn like a related egg (West Mexican Chachalaca).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
White-browed Guan
Penelope jacucaca
- 72 × 51 mm (approx.)
Entirely white, unmarked, smooth-shelled; larger than a domestic turkey egg.
Sources of information
- Size
- Nehrkorn, A. 1899. Katalog der Eiersammlung nebst Beschreibungen der aussereuropäischen Eier. Braunschweig.
- Description
- Euler, C. 1900. Descripção de ninhos e ovos das aves do Brazil. Revista do Museu Paulista 4: 9-148., p. 113.
- 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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White-crested Guan
Penelope pileata
- 74.9 × 52.1 mm (approx.)
Dull white, coarse granulated shell, glossless, unmarked.
Sources of information
- Size
- Oates, E. W. 1901. Catalogue of the Collection of Birds' Eggs in the British Museum, vol. 1. London., p. 21.
- Description
- Oates 1901 (BM Egg Catalogue vol 1).
- 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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White-winged Guan
Penelope albipennis
- 70.5 × 49.2 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.
No documented description found yet; drawn like the Crested Guan egg (same genus).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same genus: Penelope bridgesi, Penelope dabbenei, Penelope jacquacu, Penelope jacucaca, Penelope marail ….
- Description
- Estimated, no description found: drawn like a related egg (Crested Guan).
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Have you seen this egg, or know a description or measurements of it? Message us.
Yellow-knobbed Curassow
Crax daubentoni
- 90.7 × 61.8 mm
White, rough-shelled, unmarked.
Sources of information
- Size
- Average of 10 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 4. Akademie-Verlag, Berlin., p. 204.
- 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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Yungas Guan
Penelope bridgesi
- 71 × 54.6 mm
- Clutch: 2–3 eggs
White to creamy, unmarked; shell slightly rough, almost smooth.
Sources of information
- Size
- Average of 2 eggs: de la Peña, M. R. 2025. Aves Argentinas: descripción, comportamiento, reproducción y distribución. Comunicaciones del Museo Provincial de Ciencias Naturales "Florentino Ameghino" (Nueva Serie). Santa Fe., tomo 1, p. 277.
- Description
- de la Peña 2025 (Aves Argentinas tomo 1).
Drawing checked against a photo: de la Peña 2025, Aves Argentinas tomo 1, p. 277. - 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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Tell us about this egg
A description, measurements, a photo or a source (a book, paper, museum record or website) all help. We check every message and update the egg.