Birds of Western North America (Peterson Field Guide)

Peterson Field Guide to Birds of Eastern and Central North America, 6th Edition (Peterson Field Guides)

Peterson Field Guide to Western Reptiles & Amphibians, Fourth Edition (Peterson Field Guides)

National Geographic Field Guide to the Birds of Western North America

Sibley Birds West: Field Guide to Birds of Western North America

A Field Guide to Western Trees: Western United States and Canada (Peterson Field Guides (Paperback))

A Peterson Field Guide to Western Reptiles and Amphibians (Peterson Field Guides)

Peterson Field Guide to Birds of North America (Peterson Field Guides (Hardcover))

Peterson Field Guide to Bird Sounds of Western North America (Peterson Field Guides)

National Audubon Society Field Guide to North American Wildflowers: Western Region

National Audubon Society Field Guide to North American Birds, Western Region