The Sibley Guide to Bird Life and Behavior
Sibley, David Allen
Fauna Boreali-Americana. Part Second: The Birds
Swainson, William & John Richarson
Hummingbirds of North America: The Photographic Guide
Howell, Steve N.G.
Life Histories of North American Thrushes, Kinglets, and Their Allies
Bent, Arthur Cleveland and Collaborators
Woodpeckers of North America
Systematics and Behavior of Some North American Woodpeckers, Genus Picoides (Aves)
Short, Lester L.
National Geographic Field Guide to the Birds of North America, Seventh Edition
DUNN, Jon L. and Jonathan ALDERFER
Bird Lore I-XXXII
The Audubon Society Master Guide to Birding, Volume. 3: Old World Warblers to Sparrows
Farrand, John, Jr. (editor)
Birds of Organ Pipe Cactus National Monument
Wilt, Richard A.
Hawks, Eagles and Falcons of North America: Biology and Natural History
Johnsgard, Paul A.
The Warblers of North America [Third Edition]
CHAPMAN, Frank M.