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Illustration of a Rufous-collared Sparrow (Zonotrichia capensis) egg, 20.8 × 15.6 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Zonotrichia capensis

  • 20.8 × 15.6 mm
  • Clutch: 2–5 eggs
Breeds in Mexico, Central America (6 countries), the Caribbean and South America (13 countries)
show all 23Mexico: Mexico
Central America: Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama
The Caribbean: Aruba, Curaçao, Caribbean islands
South America: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela

Light blue, sometimes greenish blue, blotched and speckled all over with shades of brown, most densely at the thick end where the ground may be hidden.

Sources of information

Size
Average of 12 eggs: Skutch, A. F. 1967. Life histories of Central American highland birds. Publications of the Nuttall Ornithological Club 7. Cambridge, Mass., p. 205 (page number inferred from scan position; account starts p. 199).
Agrees with: Skutch, A. F. 1945. Incubation and nestling periods of Central American birds. Auk 62: 8-37., p. 25.
Description
Skutch, A. F. 1967. Life histories of Central American highland birds. Publications of the Nuttall Ornithological Club 7. Cambridge, Mass., p. 205 (inferred).
Drawing checked against a photo: EcoRegistros photo by Wagner Florentino, nest ('ninho') of Z. capensis, Catas Altas, Minas Gerais, Brazil, 18 Nov 2016 (record life stage 'Egg'; I did not see the image itself).
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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