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Eggs

Illustration of a Blue-gray Gnatcatcher (Polioptila caerulea) egg, 14.5 × 11.2 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Polioptila caerulea

  • 14.5 × 11.2 mm
  • Clutch: 3–5 eggs
Breeds in Canada, United States, Mexico, Belize, Guatemala, Nicaragua, Caribbean islands

Pale blue spotted with reddish to dark brown.

Sources of information

Size
Average of 50 eggs: Bent, Life Histories of North American Thrushes, Kinglets, and Their Allies (U.S. National Museum Bulletin 196, 1949), p. 351.
Agrees with: Cornell Lab of Ornithology, All About Birds: Blue-gray Gnatcatcher, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Blue-gray Gnatcatcher, Life History.
Drawing checked against a photo: Bird Eggs of Canada photo (University of Saskatchewan Department of Biology Natural History Collection).
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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