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Black-billed Seed Finch - BirdForum Opus

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Photo by Stanley Jones
San Martín, Peru, January 2017
Sporophila atrirostris

Oryzoborus atrirostris


15–16·5 cm (6-6½ in)

  • Long tail
  • Large, black bill


  • Black overall plumage
  • White on speculum and underwing coverts


  • Upperside brown
  • Underside with a slight reddish-yellow tint to the brown
Photo by Stanley Jones
San Martín, Peru, January 2017


South America: found on the eastern slope of the Andes in Ecuador Peru and Bolivia and also possibly in the extreme south-western edge of Colombia on the border with Ecuador.


Formerly placed in genus Oryzoborus.

This taxon is considered a subspecies of Great-billed Seed-Finch by some authorities[2]


There are 2 subspecies:[1]

  • S. a. atrirostris:
  • Eastern slope of Andes of northern Peru (Loreto and San Martín)
  • S. a. gigantirostris:


Immature male
Photo by swiss7
Blanquillo area, Peru

Damp grassy areas in marshy country. Rivers and lakes lined with reeds, sedges and shrubs; also riparian forest and regenerating clearings. Found at heights up to 600 m.

Rare and local in the lowlands.



Very little is know, but they presumably eat seeds.


Click on photo for larger image


  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2015. The eBird/Clements checklist of birds of the world: v2015, with updates to August 2015. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Avibase
  3. Handbook of the Birds of the World Alive (retrieved November 2015)
  4. Restall et al. 2006. Birds of Northern South America. Yale University Press. ISBN 9780300124156
  5. Ridgely and Tudor 2009. Field guide to the songbirds of South America - The Passerines. University of Texas Press. ISBN 978-0-292-71979-8

Recommended Citation

External Links

GSearch checked for 2020 platform.