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Eggs

Illustration of a Trumpeter Swan (Cygnus buccinator) egg, 110 × 71.1 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Cygnus buccinator

  • 110 × 71.1 mm
  • Clutch: 4–6 eggs
Breeds in Canada, United States

Creamy to dull white, often stained brown in the nest.

Sources of information

Size
Average of 25 eggs: Bent, A. C. 1925. Life histories of North American wild fowl, part 2. U.S. National Museum Bulletin 130, p. 297 (scan leaf 317).
Description
Cornell Lab of Ornithology, All About Birds: Trumpeter Swan, 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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