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Illustration of a Costa Rican Pygmy Owl (Glaucidium costaricanum) egg, 28.5 × 23.2 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Glaucidium costaricanum

  • 28.5 × 23.2 mm (estimated)
  • Its colour follows its family (the eggs of all its relatives are alike); we haven't found a description of this species' own egg yet. Speculative: we haven't found documented measurements of this egg yet, so we estimated its size from related birds.
Breeds in Costa Rica, Panama

Plain white, as in all owl eggs (we haven't found a description of this species' own egg yet).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Glaucidium brasilianum, Glaucidium gnoma, Glaucidium minutissimum, Glaucidium nana, Glaucidium siju.
Description
Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 10. 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).

Have you seen this egg, or know a description or measurements of it? Message us.