Nature
A Bird-Finding Guide to Mexico
Steve N. G. Howell
A Field Guide to the Birds of Mexico and Adjacent Areas: Belize, Guatemala, and El Salvador
Third Edition
by Ernest Preston Edwards (Author), Edward Murrell Butler (Illustrator)
The Sibley Field Guide to Birds of Eastern North America
by David Allen Sibley
National Audubon Society Field Guide to North American Insects and Spiders
by Lorus Milne, Lorus J. Milne
National Audubon Society Field Guide to North American Butterflies
by Robert Michael Pyle, Audubon Society
A Field Guide to Rocks and Minerals
by Frederick H. Pough
National Audubon Society Field Guide to North American Mammals
by John O. Whitaker Jr.
