48 eggs at true relative size, from the 17 mm egg of the Brewer's Sparrow to the 24.9 mm egg of the California Towhee.
About this collection. These eggs cover most of the birds that nest in Canada and the United States, plus a few famous eggs from elsewhere, like the Ostrich and the extinct Elephant Bird. It isn’t every bird in the world yet; we’ll update this note as the collection grows.
Abert's Towhee
Melozone aberti
- 24.1 × 17.8 mm
- Clutch: 1–4 eggs
Pale blue with brown markings concentrated on the large end.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 634.
Agrees with: Cornell Lab of Ornithology, All About Birds: Abert's Towhee, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Abert's Towhee, 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).
American Tree Sparrow
Spizelloides arborea
- 19.5 × 14.3 mm
- Clutch: 4–6 eggs
Pale blue with reddish speckling.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 1146.
- Description
- Cornell Lab of Ornithology, All About Birds: American Tree Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Bachman's Sparrow
Peucaea aestivalis
- 19.3 × 15.3 mm
- Clutch: 2–5 eggs
White.
Sources of information
- Size
- Average of 71 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 962.
Agrees with: Cornell Lab of Ornithology, All About Birds: Bachman's Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Bachman's Sparrow, 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).
Baird's Sparrow
Centronyx bairdii
- 19.4 × 14.6 mm
- Clutch: 4–5 eggs
Grayish white, with brown spots and blotches.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 754.
Agrees with: Cornell Lab of Ornithology, All About Birds: Baird's Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Baird's Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Bell's Sparrow
Artemisiospiza belli
- 18.93 × 14.48 mm
- Clutch: 1–4 eggs
Pale blue or bluish white speckled with brownish, ruddy, or black.
Sources of information
- Size
- Average of 40 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 1018.
Agrees with: Cornell Lab of Ornithology, All About Birds: Bell's Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Bell's Sparrow, 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).
Black-chinned Sparrow
Spizella atrogularis
- 17.6 × 13.3 mm
- Clutch: 2–5 eggs
Light bluish green either unmarked or with small scattered spots.
Sources of information
- Size
- Average of 74 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 1243.
Agrees with: Cornell Lab of Ornithology, All About Birds: Black-chinned Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Black-chinned Sparrow, 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).
Black-throated Sparrow
Amphispiza bilineata
- 17.2 × 13.3 mm
- Clutch: 2–5 eggs
White to bluish white.
Sources of information
- Size
- Dawson 1923, quoted in Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968).
Agrees with: Cornell Lab of Ornithology, All About Birds: Black-throated Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Black-throated Sparrow, 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).
Botteri's Sparrow
Peucaea botterii
- 19.8 × 15.2 mm
- Clutch: 2–5 eggs
White and unmarked.
Sources of information
- Size
- Average of 28 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 977.
- Description
- Cornell Lab of Ornithology, All About Birds: Botteri's Sparrow, 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).
Brewer's Sparrow
Spizella breweri
- 17 × 12.6 mm
- Clutch: 2–5 eggs
Blue-green, spotted with dark brown or reddish brown.
Sources of information
- Size
- Average of 59 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 1211.
Agrees with: Cornell Lab of Ornithology, All About Birds: Brewer's Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Brewer's Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
California Towhee
Melozone crissalis
- 24.9 × 18.4 mm
- Clutch: 2–5 eggs
Pale blue-white to creamy white, sparsely spotted or blotched with dark brown or purplish-black.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 616.
Agrees with: Cornell Lab of Ornithology, All About Birds: California Towhee, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: California Towhee, 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).
Canyon Towhee
Melozone fusca
- 23.4 × 17.5 mm
- Clutch: 2–6 eggs
Bluish white to pearl gray, spotted with brown, black, or purple.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 625.
Agrees with: Cornell Lab of Ornithology, All About Birds: Canyon Towhee, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Canyon Towhee, 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).
Cassin's Sparrow
Peucaea cassinii
- 19 × 14.6 mm
- Clutch: 3–4 eggs
White and unmarked.
Sources of information
- Size
- Average of 44 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 985.
- Description
- Cornell Lab of Ornithology, All About Birds: Cassin's Sparrow, 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).
Chestnut-collared Longspur
Calcarius ornatus
- 18.7 × 14.2 mm
- Clutch: 3–5 eggs
White, gray, or pale buff spotted with reddish brown or purple.
Sources of information
- Size
- Average of 90 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 3, 1968), p. 1641.
Agrees with: Cornell Lab of Ornithology, All About Birds: Chestnut-collared Longspur, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Chestnut-collared Longspur, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Chipping Sparrow
Spizella passerina
- 17.6 × 12.9 mm
- Clutch: 2–7 eggs
Pale blue to white, lightly streaked or spotted with black, brown, or purplish.
Sources of information
- Size
- Average of 90 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 1171.
Agrees with: Cornell Lab of Ornithology, All About Birds: Chipping Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Chipping Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Clay-colored Sparrow
Spizella pallida
- 17.1 × 12.7 mm
Pale bluish green with dark brown spots, mostly at the large end.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 1193.
- Description
- Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 1193.
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Make a 3D-printable copy of this egg →See posters with this egg →
Dark-eyed Junco
Junco hyemalis
- 19.4 × 14.4 mm
- Clutch: 3–6 eggs
White, gray, pale bluish white, or pale-greenish white speckled with brown, gray and green.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 1033.
- Description
- Cornell Lab of Ornithology, All About Birds: Dark-eyed Junco, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Eastern Towhee
Pipilo erythrophthalmus
- 23.1 × 17 mm
- Clutch: 2–6 eggs
Creamy, grayish, pinkish, or greenish white, spotted and speckled with brown, reddish brown, purple and gray.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 1, 1968), p. 568.
Agrees with: Cornell Lab of Ornithology, All About Birds: Eastern Towhee, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Eastern Towhee, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Field Sparrow
Spizella pusilla
- 18 × 13 mm
- Clutch: 1–5 eggs
White to creamy, spotted with pale purple, reddish-brown, or gray.
Sources of information
- Size
- Cornell Lab of Ornithology, All About Birds: Field Sparrow, Life History.
- Description
- Cornell Lab of Ornithology, All About Birds: Field Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Fox Sparrow
Passerella iliaca
- 22.7 × 16.3 mm
- Clutch: 2–5 eggs
Pale bluish green, with bold splotches or cloudy markings of reddish brown.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 3, 1968), p. 1403.
Agrees with: Cornell Lab of Ornithology, All About Birds: Fox Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Fox Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Golden-crowned Sparrow
Zonotrichia atricapilla
- 22.7 × 16.4 mm
- Clutch: 3–5 eggs
Smooth, pale blue to greenish blue, speckled with reddish brown and pale gray.
Sources of information
- Size
- Average of 42 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 3, 1968), p. 1355.
Agrees with: Cornell Lab of Ornithology, All About Birds: Golden-crowned Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Golden-crowned Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Grasshopper Sparrow
Ammodramus savannarum
- 18.7 × 14.4 mm
- Clutch: 3–7 eggs
White with light reddish brown speckles.
Sources of information
- Size
- Average of 92 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 731.
Agrees with: Cornell Lab of Ornithology, All About Birds: Grasshopper Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Grasshopper Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Green-tailed Towhee
Pipilo chlorurus
- 21.8 × 16.4 mm
- Clutch: 2–5 eggs
Pale blue, speckled with reddish brown.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 1, 1968), p. 553.
Agrees with: Cornell Lab of Ornithology, All About Birds: Green-tailed Towhee, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Green-tailed Towhee, 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).
Harris's Sparrow
Zonotrichia querula
- 22.2 × 16.7 mm
- Clutch: 3–5 eggs
Pale green with irregular spots and blotches.
Sources of information
- Size
- Average of 46 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 3, 1968), p. 1256.
Agrees with: Cornell Lab of Ornithology, All About Birds: Harris's Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Harris's Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Henslow's Sparrow
Centronyx henslowii
- 18.3 × 14.1 mm
- Clutch: 3–4 eggs
Glossy white, with speckles and blotches.
Sources of information
- Size
- Average of 55 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 782.
- Description
- Cornell Lab of Ornithology, All About Birds: Henslow's Sparrow, 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).
Lapland Longspur
Calcarius lapponicus
- 20.9 × 15.3 mm
- Clutch: 3–7 eggs
Greenish gray to olive, heavily clouded and spotted with brown, with a few dark scrawls.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 3, 1968), p. 1602.
Agrees with: Cornell Lab of Ornithology, All About Birds: Lapland Longspur, Life History. - Description
- Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 3, 1968), p. 1602.
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Make a 3D-printable copy of this egg →See posters with this egg →
Lark Bunting
Calamospiza melanocorys
- 21.9 × 16.8 mm
- Clutch: 2–5 eggs
Unmarked light blue.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 643.
Agrees with: Cornell Lab of Ornithology, All About Birds: Lark Bunting, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Lark Bunting, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Lark Sparrow
Chondestes grammacus
- 20.1 × 15.9 mm
- Clutch: 3–6 eggs
Creamy white with dark spots and scrawls.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 891.
Agrees with: Cornell Lab of Ornithology, All About Birds: Lark Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Lark Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
LeConte's Sparrow
Ammospiza leconteii
- 18 × 13.7 mm
- Clutch: 4–5 eggs
Pale greenish covered in fine brown specks.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 769.
Agrees with: Cornell Lab of Ornithology, All About Birds: LeConte's Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: LeConte's Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Lincoln's Sparrow
Melospiza lincolnii
- 19.7 × 14.6 mm
- Clutch: 3–5 eggs
Pale greenish to pinkish white with brown specks and blotches.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 3, 1968), p. 1444.
Agrees with: Cornell Lab of Ornithology, All About Birds: Lincoln's Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Lincoln's Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
McKay's Bunting
Plectrophenax hyperboreus
- 23.2 × 17.3 mm
Pale greenish white, spotted and blotched with brown.
Sources of information
- Size
- Average of 7 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 3, 1968), p. 1679.
- Description
- Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 3, 1968), p. 1679.
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
Nelson's Sparrow
Ammospiza nelsoni
- 19.7 × 14.9 mm
- Clutch: 2–6 eggs
Greenish, covered with dark speckles.
Sources of information
- Size
- Average of 40 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 791.
Agrees with: Cornell Lab of Ornithology, All About Birds: Nelson's Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Nelson's Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Olive Sparrow
Arremonops rufivirgatus
- 21.8 × 16.2 mm
- Clutch: 2–5 eggs
White to pale pink.
Sources of information
- Size
- Average of 45 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 1, 1968), p. 546.
Agrees with: Cornell Lab of Ornithology, All About Birds: Olive Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Olive Sparrow, 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).
Rufous-crowned Sparrow
Aimophila ruficeps
- 20 × 15.6 mm
- Clutch: 2–5 eggs
Bluish white to white, without spots.
Sources of information
- Size
- Average of 71 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 927.
- Description
- Cornell Lab of Ornithology, All About Birds: Rufous-crowned Sparrow, 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).
Rufous-winged Sparrow
Peucaea carpalis
- 19.1 × 13.9 mm
- Clutch: 2–5 eggs
Pale bluish or green, with no markings.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 912.
- Description
- Cornell Lab of Ornithology, All About Birds: Rufous-winged Sparrow, 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).
Sagebrush Sparrow
Artemisiospiza nevadensis
- 19.47 × 14.56 mm
- Clutch: 1–4 eggs
Pale blue or bluish white speckled with brownish, ruddy, or black.
Sources of information
- Size
- Average of 70 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 1008.
Agrees with: Cornell Lab of Ornithology, All About Birds: Sagebrush Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Sagebrush Sparrow, 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).
Saltmarsh Sparrow
Ammospiza caudacuta
- 19.4 × 14.6 mm
- Clutch: 3–6 eggs
Greenish, covered with dark speckles.
Sources of information
- Size
- Average of 105 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 801.
Agrees with: Cornell Lab of Ornithology, All About Birds: Saltmarsh Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Saltmarsh Sparrow, 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).
Savannah Sparrow
Passerculus sandwichensis
- 19.5 × 14.7 mm
- Clutch: 2–6 eggs
Pale greenish, bluish, tan, or white, with speckles and streaks. Colors vary greatly, sometimes even within clutches.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 681.
Agrees with: Cornell Lab of Ornithology, All About Birds: Savannah Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Savannah Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Seaside Sparrow
Ammospiza maritima
- 20.9 × 15.5 mm
- Clutch: 2–5 eggs
Bluish white to grayish white, speckled and blotched with shades of brown, often more heavily on larger end.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 822.
- Description
- Cornell Lab of Ornithology, All About Birds: Seaside Sparrow, 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).
Smith's Longspur
Calcarius pictus
- 21 × 15 mm
- Clutch: 1–6 eggs
Light gray-brown or pale green, with dark lines, dots, and blotches of lavender or purplish-brown.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 3, 1968), p. 1630.
- Description
- Cornell Lab of Ornithology, All About Birds: Smith's Longspur, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Snow Bunting
Plectrophenax nivalis
- 22.9 × 16.5 mm
- Clutch: 2–7 eggs
Creamy white with variable brown spots and scrawls.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 3, 1968), p. 1660.
Agrees with: Cornell Lab of Ornithology, All About Birds: Snow Bunting, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Snow Bunting, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Song Sparrow
Melospiza melodia
- 20.4 × 15.6 mm
- Clutch: 1–6 eggs
Blue, blue-green, or gray-green spotted with brown, red-brown, or lilac.
Sources of information
- Size
- Average of 400 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 3, 1968), p. 1496.
Agrees with: Cornell Lab of Ornithology, All About Birds: Song Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Song Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Spotted Towhee
Pipilo maculatus
- 24.1 × 18 mm
- Clutch: 2–6 eggs
White, gray, green, or pinkish, spotted with reddish brown, purple or gray.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 1, 1968), p. 583.
Agrees with: Cornell Lab of Ornithology, All About Birds: Spotted Towhee, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Spotted Towhee, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Swamp Sparrow
Melospiza georgiana
- 17.5 × 14.5 mm
- Clutch: 1–6 eggs
Bluish green with spots and blotches.
Sources of information
- Size
- Cornell Lab of Ornithology, All About Birds: Swamp Sparrow, Life History.
- Description
- Cornell Lab of Ornithology, All About Birds: Swamp Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Thick-billed Longspur
Rhynchophanes mccownii
- 20.4 × 15 mm
- Clutch: 2–6 eggs
Eggs white to pale olive, with brown scrawls and lavender or rust-colored speckling.
Sources of information
- Size
- Average of 100 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 3, 1968), p. 1581.
- Description
- Cornell Lab of Ornithology, All About Birds: Thick-billed Longspur, 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).
Vesper Sparrow
Pooecetes gramineus
- 20.7 × 15.2 mm
- Clutch: 2–6 eggs
Whitish, with variable brown or purplish spots, streaks, and blotches.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 872.
Agrees with: Cornell Lab of Ornithology, All About Birds: Vesper Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Vesper Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
White-crowned Sparrow
Zonotrichia leucophrys
- 21.5 × 15.6 mm
- Clutch: 3–7 eggs
Greenish, greenish-blue, or bluish spotted with reddish brown.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 3, 1968), p. 1279.
Agrees with: Cornell Lab of Ornithology, All About Birds: White-crowned Sparrow, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: White-crowned Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
White-throated Sparrow
Zonotrichia albicollis
- 21 × 15.5 mm
- Clutch: 1–6 eggs
Very pale blue or greenish blue speckled with purplish, chestnut, and lilac.
Sources of information
- Size
- Cornell Lab of Ornithology, All About Birds: White-throated Sparrow, Life History.
- Description
- Cornell Lab of Ornithology, All About Birds: White-throated Sparrow, 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).
Make a 3D-printable copy of this egg →See posters with this egg →
Yellow-eyed Junco
Junco phaeonotus
- 19.9 × 15.1 mm
- Clutch: 1–5 eggs
Grayish white to pale bluish with tiny reddish speckling.
Sources of information
- Size
- Average of 65 eggs: Bent, Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies (U.S. National Museum Bulletin 237, Part 2, 1968), p. 1129.
Agrees with: Cornell Lab of Ornithology, All About Birds: Yellow-eyed Junco, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Yellow-eyed Junco, 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).