Diving Birds of North America
Johnsgard, Paul A.
A Swift Guide to Butterflies of North America Second Edition
Report Upon Geographical and Geological Explorations and Surveys West of the One Hundredth Meridian:
Wheeler, Geo. M. & John J. Stevenson
The Temple of Tepoztlan, Mexico
The Birds of North and Middle America. Part XI [Hardcover]
Friedmann, Herbert [Robert Ridgway]
Birds in Bermuda
Slaughter, Richard A.
Honker: A Discussion of the Habits and Needs of the Largest of Our Canada Geese
Sibley's Backyard Birds of the Midwest
Sibley, David Allen
The Bird Watcher's America
Pettingill Jr., Olin Sewall
Hawks and Owls of North America: A Complete Guide to North American Birds of Prey
Heintzelman, Donald S.
The Birds of North and Middle America: A Descriptive Catalog
RIDGWAY, Robert and Herbert FRIEDMANN.
The Avifauna of Tiburon Island, Sonora, Mexico, with Descriptions of Four New Races
van Rossem, A.J.