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Eggs

Illustration of a Black Siskin (Spinus atratus) egg, 17.7 × 13.2 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Spinus atratus

  • 17.7 × 13.2 mm
  • Clutch: 3 eggs
Breeds in Argentina, Bolivia, Chile, Peru

Very pale bluish white, with a few fine dark dots mostly at the large end.

Sources of information

Size
Average of 3 eggs: de la Peña, M. R. 2025. Aves Argentinas: descripción, comportamiento, reproducción y distribución. Comunicaciones del Museo Provincial de Ciencias Naturales "Florentino Ameghino" (Nueva Serie). Santa Fe., tomo 11, p. 284.
Description
de la Peña 2025 (Aves Argentinas tomo 11); supporting: Ogilvie-Grant 1912 (BM Egg Catalogue vol 5).
Drawing checked against a photo: de la Peña 2025, Aves Argentinas tomo 11, p. 284.
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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