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Bird eggs

7 eggs at true relative size, from the 29.7 mm egg of the Ashy Storm-Petrel to the 120 mm egg of the Emperor Penguin.

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.

Make a poster of these 7 eggs
Emperor Penguin egg, 120 × 80 mm Laysan Albatross egg, 108 × 69 mm Northern Gannet egg, 77.6 × 47 mm Northern Fulmar egg, 74 × 51 mm Fork-tailed Storm-Petrel egg, 33.9 × 25.7 mm Leach's Storm-Petrel egg, 32.5 × 24 mm Ashy Storm-Petrel egg, 29.7 × 22.8 mm
All 7 eggs at the same scale, largest first. Tap an egg to jump to it.
Ashy Storm-Petrel egg, 29.7 × 22.8 mm

Ashy Storm-Petrel

Hydrobates homochroa

  • 29.7 × 22.8 mm

White, sometimes with a faint ring of reddish dots at the large end.

Sources of information

Size
Average of 54 eggs: Bent, Life Histories of North American Petrels and Pelicans and Their Allies (U.S. National Museum Bulletin 121, 1922), p. 161.
Description
Bent, Life Histories of North American Petrels and Pelicans and Their Allies (U.S. National Museum Bulletin 121, 1922), 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).

Make a 3D-printable copy of this egg →

Fork-tailed Storm-Petrel egg, 33.9 × 25.7 mm

Fork-tailed Storm-Petrel

Hydrobates furcatus

  • 33.9 × 25.7 mm

Dull white, often with blunt end encircled by ring of dark purplish-red spots.

Sources of information

Size
Average of 40 eggs: Bent, Life Histories of North American Petrels and Pelicans and Their Allies (U.S. National Museum Bulletin 121, 1922), p. 134.
Description
Cornell Lab of Ornithology, All About Birds: Fork-tailed Storm-Petrel, Life History.
Drawing checked against a photo: Bird Eggs of Canada photo (Royal Alberta Museum).
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 →

Laysan Albatross egg, 108 × 69 mm

Laysan Albatross

Phoebastria immutabilis

  • 108 × 69 mm
  • Clutch: 1 eggs

Creamy white with brown spotting.

Sources of information

Size
Cornell Lab of Ornithology, All About Birds: Laysan Albatross, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Laysan Albatross, Life History.
Drawing checked against a photo: Wikimedia Commons photo; Cornell Lab of Ornithology, Birds of the World: Laysan Albatross.
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 →

Leach's Storm-Petrel egg, 32.5 × 24 mm

Leach's Storm-Petrel

Hydrobates leucorhous

  • 32.5 × 24 mm
  • Clutch: 1 eggs

White, often with some lilac to burgundy spotting on the larger end.

Sources of information

Size
Average of 55 eggs: Bent, Life Histories of North American Petrels and Pelicans and Their Allies (U.S. National Museum Bulletin 121, 1922), p. 141.
Description
Cornell Lab of Ornithology, All About Birds: Leach's Storm-Petrel, 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).

Make a 3D-printable copy of this egg →See posters with this egg →

Northern Fulmar egg, 74 × 51 mm

Northern Fulmar

Fulmarus glacialis

  • 74 × 51 mm
  • Clutch: 1 eggs

White.

Sources of information

Size
Average of 77 eggs: Bent, Life Histories of North American Petrels and Pelicans and Their Allies (U.S. National Museum Bulletin 121, 1922), p. 34.
Description
Cornell Lab of Ornithology, All About Birds: Northern Fulmar, 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).

Make a 3D-printable copy of this egg →

Northern Gannet egg, 77.6 × 47 mm

Northern Gannet

Morus bassanus

  • 77.6 × 47 mm
  • Clutch: 1 eggs

Pale blue or greenish.

Sources of information

Size
Average of 44 eggs: Bent, Life Histories of North American Petrels and Pelicans and Their Allies (U.S. National Museum Bulletin 121, 1922), p. 221.
Description
Cornell Lab of Ornithology, All About Birds: Northern Gannet, 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).

Make a 3D-printable copy of this egg →

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