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Eggs

Illustration of a Brown Booby (Sula leucogaster) egg, 61.2 × 40.1 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Sula leucogaster

  • 61.2 × 40.1 mm
  • Clutch: 2 eggs
Breeds in United States, Mexico, Central America (6 countries), the Caribbean and South America (3 countries)
show all 13Canada & United States: United States
Mexico: Mexico
Central America: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Panama
The Caribbean: Trinidad and Tobago, Caribbean islands
South America: Brazil, Colombia, Venezuela

Chalky white, slightly roughened, over a pale bluish-white shell; usually stained.

Sources of information

Size
Average of 6 eggs: Wetmore, A. 1965. The birds of the Republic of Panamá, part 1 (Tinamidae to Rynchopidae). Smithsonian Miscellaneous Collections 150(1)., p. 60.
Description
Wetmore 1965, The Birds of the Republic of Panamá, Part 1 (Smithsonian Misc. Coll. 150).
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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