Hummingbirds of Colombia
Mazariegos H., Luis A.
Birds of the High Andes: A Manual to the Birds of the Temperate Zone of the Andes and Patagonia, Sou
Fjeldsa, Jon; Krabbe, Niels
The Birds of Eastern North America- Water Birds and Land Birds [Parts 1 and II]
Cory, Charles B.
My Life in Natural History
Breckenridge, Walter J.
Birds of Guatemala
LAND, Hugh C.
The Harris's Hawk Revolution
Coulson, Jennifer and Tom
Nomenclature of North American Birds
Publications of The British Trust for Ornithology
A Contribution to the Ornithology of the Tristan Da Cunha Group [Ibis Vol. 99, No. 4]
The American Woodcock Philohela minor (Gmelin)
Pettingill, Olin Sewall, Jr.
The Gulls (Laridae) of the World; Their Plumages, Moults, Variations, Relationships and Distribution
Dwight, Jonathan, M.D.
Birds of Central New Guinea
Mayr, Ernst & E. Thomas Gilliard