Birds of the Black Hills
Pettingill, Olin Sewall, Jr. and Nathaniel R. Whitney, Jr.
Hummingbirds of North America: The Photographic Guide
Howell, Steve N.G.
National Geographic Field Guide to the Birds of North America, Seventh Edition
DUNN, Jon L. and Jonathan ALDERFER
Birds of New York State
Diving Birds of North America
Johnsgard, Paul A.
Hawks in Flight: The Flight Identification of North American Migrant Raptors [First edition]
Dunne, Pete; Sutton, Clay
Birding's Indiana Jones: A Chaser's Diary
The American Ornithologists' Union: The First Century, 1883-1983
Sterling, Keir B. and Marianne G. Ainley; Edited by William E. Davis, Jr. and Byron K. Butler
Owls of North America [PB]
The West Virginia Breeding Bird Atlas
Buckelew, Albert R.; Hall, George A.
Barn Owl: Birds of North America species account
Carl D. Marti.
Hummingbirds: Their Life and Behavior. A photographic Study of the North American species
Tyrrell, Esther Q.; Tyrrell, Robert A.