Bird Biology
Start with high-confidence bird biology books, then narrow by subgenre or adjacent topics.
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The Wall of Birds
The Story of Birds
What It's Like to Be a Bird
The Sibley Guide to Birds, Second Edition
The Sibley Field Guide to Birds of Eastern North America
The Sibley Field Guide to Birds of Western North America
Peterson Field Guide to Weather
Peterson Field Guide to Freshwater Fishes, Second Edition
More Bird Biology Books
What an Owl Knows
An Anthology of Exquisite Birds
The Bird Book
The Boy Who Drew Birds
The Bird Way
Butterflies and Moths
Bird Songs
Giving the Bird
The Birds of Panama
The Birds of Costa Rica
The Feather Thief
The Race to Save the Lord God Bird
Peterson Field Guide to Birds of Western North America, Fifth Edition
Field Guide to Mammals of Europe, North Africa and the Middle East
Fly
Birds of North America
Birds of the Photo Ark
National Geographic Backyard Guide to the Birds of North America, 2nd Edition
National Geographic Field Guide to the Birds of the United States and Canada—east, 2nd Edition
National Geographic Field Guide to the Birds of the United States and Canada—west, 2nd Edition
Little Kids First Nature Guide Birds
Gifts of the Crow
The Field Guide to Dumb Birds of North America
Birds of Ecuador and the Galápagos Islands
Ravens in Winter
Return of the Osprey
Florida Wildlife Encyclopedia
Ecuador and the Galapogos Islands (traveller's Wildlife Guides)
Bats
Birds of Michigan Field Guide
Birds of Ohio Field Guide
The Hidden Lives of Owls