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Illustration of a Greater Roadrunner (Geococcyx californianus) egg, 39.2 × 30.1 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Geococcyx californianus

  • 39.2 × 30.1 mm
  • Clutch: 2–6 eggs
Breeds in United States, Mexico

White covered with a chalky yellow film, sometimes stained with brown or gray.

Sources of information

Size
Average of 55 eggs: Bent, Life Histories of North American Cuckoos, Goatsuckers, Hummingbirds and Their Allies (U.S. National Museum Bulletin 176, 1940), p. 41.
Agrees with: Cornell Lab of Ornithology, All About Birds: Greater Roadrunner, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Greater Roadrunner, Life History.
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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