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Handbook of the birds of Europe, the Middle East, and North Africa: the birds of the Western Palearctic. Volume 1: Ostrich - Ducks
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Aves Uruguayas (Síntesis de las Familias) 1ª Parte: No Passeriformes.
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Howard, Richard and Alick Moore. 1991.
A complete checklist of the Birds of the World. Second Edition.
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A Phylogenetic Analysis of Recent Anseriform Genera Using Morphological Characters
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Las Aves Sudamericanas: Una guía de campo
Tomo Primero (Pingüinos - Pájaros Carpinteros)
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Handbook of North American Birds: Waterfowl
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Manual of Ornithology: Avian Structure & Function
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Rand, Austin L. and E. Thomas Gilliard. 1968.
Handbook of New Guinea Birds
The Natural History Press. Garden City, New York. 628 pgs.

Rodríguez, José Vicente. 1982.
Aves del Parque Nacional Natural los Katíos: Antioquia, Chocó, Colombia
Proyecto ICA. Talleres Inderena. Bogota. 328 pgs. (Spanish)

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Distribution and Taxonomy of Birds of the World.
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Birds in Brazil
Traducido al inglés del portugués por William Belton
Princeton University Press. Princeton, New Jersey.
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Wildfowl of the World
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Wetmore, Alexander. 1926.
Observations on the birds of Argentina, Paraguay, Uruguay, and Chile
Smithsonian Institution. Bulletin 133. Washington. pgs 69-86.