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Illustration of a Long-billed Starthroat (Heliomaster longirostris) egg, 13.2 × 8.65 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Heliomaster longirostris

  • 13.2 × 8.65 mm
  • Clutch: 2 eggs
Breeds in Mexico, Central America (7 countries), Trinidad and Tobago and South America (8 countries)
show all 17Mexico: Mexico
Central America: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama
The Caribbean: Trinidad and Tobago
South America: Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, Suriname, Venezuela

White, unmarked.

Sources of information

Size
Average of 2 eggs: Wetmore, A. 1968. The birds of the Republic of Panamá. Part 2. Columbidae (pigeons) to Picidae (woodpeckers). Smithsonian Miscellaneous Collections 150(2)., p. 368 (printed page inferred from scan position, i.e. search-index leaf minus 12; read via archive.org page OCR).
Agrees with: Rowley, J. S. 1966. Breeding records of birds of the Sierra Madre del Sur, Oaxaca, México. Proceedings of the Western Foundation of Vertebrate Zoology 1(3)., p. 152 (as cited by Wetmore; not read directly).
Description
Wetmore 1968, The Birds of the Republic of Panama, pt 2 (Smithsonian Misc. Coll. 150) (quoting Rowley 1966).
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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