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Illustration of an Atlantic White Tern (Gygis alba) egg, 43.9 × 32.6 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Gygis alba

  • 43.9 × 32.6 mm
  • Speculative: we haven't found a documented description of this egg yet, so we estimated its colours and markings from related birds.
Breeds in Costa Rica, Brazil

No documented description found yet; drawn like the Blue-billed White Tern egg (same genus).

Sources of information

Size
Average of 32 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 8. Akademie-Verlag, Berlin., p. 457.
Description
Estimated, no description found: drawn like a related egg (Blue-billed White Tern).
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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