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Eggs

Illustration of a Cliff Swallow (Petrochelidon pyrrhonota) egg, 20.3 × 13.9 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Petrochelidon pyrrhonota

  • 20.3 × 13.9 mm
  • Clutch: 1–6 eggs
Breeds in Canada, United States, Mexico, Argentina

White, creamy, or pinkish, with brown speckles or blotches.

Sources of information

Size
Average of 50 eggs: Bent, Life Histories of North American Flycatchers, Larks, Swallows, and Their Allies (U.S. National Museum Bulletin 179, 1942), p. 474.
Agrees with: Cornell Lab of Ornithology, All About Birds: Cliff Swallow, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Cliff Swallow, 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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