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Illustration of a Great Blue Heron (Ardea herodias) egg, 64.5 × 45.2 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Ardea herodias

  • 64.5 × 45.2 mm
  • Clutch: 2–6 eggs
Breeds in Canada and United States, Mexico, Central America (7 countries), the Caribbean and Ecuador
show all 12Canada & United States: Canada, United States
Mexico: Mexico
Central America: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama
The Caribbean: Caribbean islands
South America: Ecuador

Pale blue, fading slightly with age.

Sources of information

Size
Average of 50 eggs: Bent, Life Histories of North American Marsh Birds (U.S. National Museum Bulletin 135, 1927), p. 106.
Agrees with: Cornell Lab of Ornithology, All About Birds: Great Blue Heron, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Great Blue Heron, Life History.
Drawing checked against a photo: Flickr photo by Burke Museum; Bird Eggs of Canada photo (Royal Saskatchewan Museum).
Clutch
Cornell Lab of Ornithology, All About Birds.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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