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Illustration of a Great Horned Owl (Bubo virginianus) egg, 56.1 × 47 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Bubo virginianus

  • 56.1 × 47 mm
  • Clutch: 1–4 eggs
Breeds in Canada and United States, Mexico and Central America (7 countries)
show all 10Canada & United States: Canada, United States
Mexico: Mexico
Central America: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama

Dull white and nearly spherical, with a rough surface.

Sources of information

Size
Average of 53 eggs: Bent, Life Histories of North American Birds of Prey, Part 2 (U.S. National Museum Bulletin 170, 1938), p. 302.
Description
Cornell Lab of Ornithology, All About Birds: Great Horned Owl, Life History.
Drawing checked against a photo: 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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