The Zoology of the Voyage of H.M.S. Beagle: during the Years 1832 to 1836, Volume 2. Birds
Gould, John, Edited by Charles Darwin
The Princeton Guide to North American Birds
Birds of Argentina and the South-West Atlantic. Two-volume set
Birds of Mongolia [PB]
Gombobaatar, Sundev; Br�unlich, Axel; Boldbaatar, Sh.
Birds of Brazil