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Illustration of a Ruby-crowned Kinglet (Regulus calendula) egg, 13.7 × 10.8 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Regulus calendula

  • 13.7 × 10.8 mm
  • Clutch: 5–12 eggs
Breeds in Canada, United States

Drab white spotted with red-brown around large end.

Sources of information

Size
Average of 40 eggs: Bent, Life Histories of North American Thrushes, Kinglets, and Their Allies (U.S. National Museum Bulletin 196, 1949), p. 404.
Agrees with: Cornell Lab of Ornithology, All About Birds: Ruby-crowned Kinglet, Life History.
Description
Cornell Lab of Ornithology, All About Birds: Ruby-crowned Kinglet, Life History.
Drawing checked against a photo: Bird Eggs of Canada photo (Royal Alberta 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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