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Illustration of a Black-billed Nightingale-Thrush (Catharus gracilirostris) egg, 21 × 17 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Catharus gracilirostris

  • 21 × 17 mm
Breeds in Costa Rica, Panama

Bluish white with well-defined round rusty-brown spots.

Sources of information

Size
Average of 2 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 20. Akademie-Verlag, Berlin., p. 446.
Description
Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 20. Akademie-Verlag, Berlin., pdf p. 25.
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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