The Sibley Guide to Bird Life & Behavior
Sibley's Birding Basics: How to Identify Birds, Using the Clues in Feathers, Habitats, Behaviors, and Sounds
The Sibley Guide to Birds, 2nd Edition
The Sibley Field Guide to Birds of Eastern North America: Second Edition
The Birder's Handbook: A Field Guide to the Natural History of North American Birds
Sibley Birds West: Field Guide to Birds of Western North America
The Sibley Field Guide to Birds of Western North America
The Sibley Field Guide to Birds of Eastern North America
The Sibley Guide to Trees
The Thing with Feathers: The Surprising Lives of Birds and What They Reveal About Being Human