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 Hummingbirds of North America, Second edition
Johnsgard, Paul A.
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.
The Warblers of North America [Third Edition]
CHAPMAN, Frank M.
A Field Guide to the Nests, Eggs and Nestlings of North American Birds
North American Birds: A Coloring Book
The American Robin: A Backyard Institution
Illustrations by Hall, Martha R.
Handbook of Birds of Eastern North America
Chapman, Frank M.
U.S. Pacific Railroad Surveys: Reports of Explorations and Surveys. Volume IX, Part II
Baird, Spencer Fullerton