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Illustration of a Masked Yellowthroat (Geothlypis aequinoctialis) egg, 18.2 × 14.1 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Geothlypis aequinoctialis

  • 18.2 × 14.1 mm
  • Clutch: 2 eggs
Breeds in Trinidad and Tobago and South America (12 countries)
show all 13The Caribbean: Trinidad and Tobago
South America: Argentina, Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela

White with darker brown flecks and pale lilac under-marks, most at the larger end.

Sources of information

Size
Average of 25 eggs: Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 29–36. Akademie-Verlag, Berlin., p. 346.
Description
Wikipedia: Masked yellowthroat (accessed Oct 2026); supporting: Skutch, A. F. 1967. Life Histories of Central American Highland Birds. Publ. Nuttall Orn. Club 7, pp. 146-149; supporting: Wetmore, A., Pasquier, R. F. & Olson, S. L. 1984. The Birds of the Republic of Panama, Part 4. Smithsonian Misc. Coll. 150(4).
Drawing checked against a photo: de la Peña 2025, Aves Argentinas tomo 11, p. 127.
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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