26 eggs at true relative size, from the 37.5 mm egg of the Sharp-shinned Hawk to the 106 mm egg of the California Condor.
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.
American Goshawk
Astur atricapillus
- 58 × 45 mm
- Clutch: 2–4 eggs
Bluish white, sometimes slightly blotched.
Sources of information
- Size
- Cornell Lab of Ornithology, All About Birds: American Goshawk, Life History.
- Description
- Cornell Lab of Ornithology, All About Birds: American Goshawk, 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 →
Bald Eagle
Haliaeetus leucocephalus
- 70.5 × 54.2 mm
- Clutch: 1–3 eggs
Dull white, usually without markings.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 339.
Agrees with: Cornell Lab of Ornithology, All About Birds: Bald Eagle, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Bald Eagle, 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 →
Black Vulture
Coragyps atratus
- 75.6 × 50.9 mm
- Clutch: 1–3 eggs
Pale green or sometimes bluish white, usually with a few large brown blotches on the larger end.
Sources of information
- Size
- Average of 51 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 33.
Agrees with: Cornell Lab of Ornithology, All About Birds: Black Vulture, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Black Vulture, 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).
Broad-winged Hawk
Buteo platypterus
- 50.5 × 39.5 mm
- Clutch: 1–5 eggs
White, creamy, or bluish, with a granulated surface; either unmarked or with variable brown markings.
Sources of information
- Size
- Cornell Lab of Ornithology, All About Birds: Broad-winged Hawk, Life History.
- Description
- Cornell Lab of Ornithology, All About Birds: Broad-winged Hawk, 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 Condor
Gymnogyps californianus
- 106 × 65 mm
Pale blue-green bleaching to white or creamy.
Sources of information
- Size
- Cornell Lab of Ornithology, All About Birds: California Condor, Life History.
- Description
- Cornell Lab of Ornithology, All About Birds: California Condor, Life History.
- 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 →
Common Black Hawk
Buteogallus anthracinus
- 57.3 × 44.9 mm
- Clutch: 3–4 eggs
Greenish white with reddish-brown blotches.
Sources of information
- Size
- Average of 60 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 261.
Agrees with: Cornell Lab of Ornithology, All About Birds: Common Black Hawk, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Common Black Hawk, 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).
Cooper's Hawk
Astur cooperii
- 49 × 38.5 mm
- Clutch: 2–6 eggs
Pale blue to bluish white.
Sources of information
- Size
- Average of 62 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 115.
Agrees with: Cornell Lab of Ornithology, All About Birds: Cooper's Hawk, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Cooper's Hawk, 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 →
Ferruginous Hawk
Buteo regalis
- 61.2 × 48 mm
- Clutch: 1–8 eggs
Creamy white with buff or brown blotches.
Sources of information
- Size
- Average of 53 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 287.
Agrees with: Cornell Lab of Ornithology, All About Birds: Ferruginous Hawk, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Ferruginous Hawk, 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 Eagle
Aquila chrysaetos
- 74.5 × 58 mm
- Clutch: 1–3 eggs
White to cream or pale pink, usually with small brown blotches.
Sources of information
- Size
- Average of 59 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 299.
Agrees with: Cornell Lab of Ornithology, All About Birds: Golden Eagle, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Golden Eagle, 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 →
Gray Hawk
Buteo plagiatus
- 50.8 × 41 mm
- Clutch: 1–4 eggs
White to pale blue, sometimes spotted with brown.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 266.
Agrees with: Cornell Lab of Ornithology, All About Birds: Gray Hawk, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Gray Hawk, 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 Hawk
Parabuteo unicinctus
- 53.7 × 42.1 mm
- Clutch: 1–5 eggs
Very pale bluish that fades to white, may have a few pale brown or lavender spots.
Sources of information
- Size
- Average of 52 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 143.
- Description
- Cornell Lab of Ornithology, All About Birds: Harris's Hawk, 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).
Mississippi Kite
Ictinia mississippiensis
- 41.3 × 34 mm
- Clutch: 1–3 eggs
Dull white.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 66.
Agrees with: Cornell Lab of Ornithology, All About Birds: Mississippi Kite, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Mississippi Kite, 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).
Northern Harrier
Circus hudsonius
- 46.6 × 36.4 mm
- Clutch: 4–5 eggs
Dull white, usually with no markings.
Sources of information
- Size
- Average of 84 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 82.
Agrees with: Cornell Lab of Ornithology, All About Birds: Northern Harrier, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Northern Harrier, 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 →
Osprey
Pandion haliaetus
- 61.5 × 46 mm
- Clutch: 1–4 eggs
Cream to pinkish cinnamon; wreathed and spotted with reddish brown.
Sources of information
- Size
- Cornell Lab of Ornithology, All About Birds: Osprey, Life History.
- Description
- Cornell Lab of Ornithology, All About Birds: Osprey, 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 →
Red-shouldered Hawk
Buteo lineatus
- 54.5 × 42.8 mm
- Clutch: 2–5 eggs
Dull white or faint bluish with brown blotches and markings.
Sources of information
- Size
- Cornell Lab of Ornithology, All About Birds: Red-shouldered Hawk, Life History.
- Description
- Cornell Lab of Ornithology, All About Birds: Red-shouldered Hawk, 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 →
Red-tailed Hawk
Buteo jamaicensis
- 59 × 47 mm
- Clutch: 1–5 eggs
White or buffy, blotched or speckled with buff, brown, or purple.
Sources of information
- Size
- Average of 59 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 153.
Agrees with: Cornell Lab of Ornithology, All About Birds: Red-tailed Hawk, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Red-tailed Hawk, 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 →
Rough-legged Hawk
Buteo lagopus
- 56.6 × 44.9 mm
- Clutch: 1–7 eggs
Pale greenish or blue, blotched and streaked with brown.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 272.
Agrees with: Cornell Lab of Ornithology, All About Birds: Rough-legged Hawk, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Rough-legged Hawk, 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 →
Sharp-shinned Hawk
Accipiter striatus
- 37.5 × 30.4 mm
- Clutch: 3–8 eggs
Dull-white or pale-blue splotched with brown, violet, red, or hazel.
Sources of information
- Size
- Average of 58 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 99.
Agrees with: Cornell Lab of Ornithology, All About Birds: Sharp-shinned Hawk, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Sharp-shinned Hawk, 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 →
Short-tailed Hawk
Buteo brachyurus
- 53.4 × 42.8 mm
- Clutch: 2 eggs
Pale bluish white, sometimes with reddish brown spots.
Sources of information
- Size
- Average of 27 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 257.
- Description
- Cornell Lab of Ornithology, All About Birds: Short-tailed Hawk, 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).
Snail Kite
Rostrhamus sociabilis
- 44.2 × 36.2 mm
- Clutch: 1–5 eggs
Dull white splotched with brown.
Sources of information
- Size
- Average of 65 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 74.
Agrees with: Cornell Lab of Ornithology, All About Birds: Snail Kite, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Snail Kite, 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).
Swainson's Hawk
Buteo swainsoni
- 56.5 × 44 mm
- Clutch: 1–5 eggs
Off-white, often blotched with dark reddish brown or pale purple.
Sources of information
- Size
- Average of 166 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 226.
Agrees with: Cornell Lab of Ornithology, All About Birds: Swainson's Hawk, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Swainson's Hawk, 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 →
Swallow-tailed Kite
Elanoides forficatus
- 46.7 × 37.4 mm
- Clutch: 1–3 eggs
Creamy white with dark brown or reddish brown markings.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 48.
Agrees with: Cornell Lab of Ornithology, All About Birds: Swallow-tailed Kite, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Swallow-tailed Kite, 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).
Turkey Vulture
Cathartes aura
- 71.3 × 48.6 mm
- Clutch: 1–3 eggs
Creamy white tinged with gray, blue, or green, and spotted with purple to brown.
Sources of information
- Size
- Average of 52 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 16.
Agrees with: Cornell Lab of Ornithology, All About Birds: Turkey Vulture, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Turkey Vulture, 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-tailed Hawk
Geranoaetus albicaudatus
- 58.9 × 46.5 mm
- Clutch: 2–3 eggs
White to pale bluish white, sometimes lightly spotted with brown.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 218.
Agrees with: Cornell Lab of Ornithology, All About Birds: White-tailed Hawk, Life History. - Description
- Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 218.
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
White-tailed Kite
Elanus leucurus
- 42.5 × 32.8 mm
- Clutch: 4 eggs
White overall, spotted with dark brown.
Sources of information
- Size
- Average of 50 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 58.
Agrees with: Cornell Lab of Ornithology, All About Birds: White-tailed Kite, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: White-tailed Kite, 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).
Zone-tailed Hawk
Buteo albonotatus
- 55.6 × 43.5 mm
- Clutch: 1–3 eggs
White to bluish white, sometimes spotted with lavender or yellowish brown.
Sources of information
- Size
- Average of 37 eggs: Bent, Life Histories of North American Birds of Prey, Part 1 (U.S. National Museum Bulletin 167, 1937), p. 214.
Agrees with: Cornell Lab of Ornithology, All About Birds: Zone-tailed Hawk, Life History. - Description
- Cornell Lab of Ornithology, All About Birds: Zone-tailed Hawk, 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).