Sibley's Birding Basics: How to Identify Birds, Using the Clues in Feathers, Habitats, Behaviors, and Sounds (Sibley Guides)

Sibley's Birding Basics: How to Identify Birds, Using the Clues in Feathers, Habitats, Behaviors, and Sounds (Sibley Guides)

The Sibley Field Guide to Birds of Eastern North America: Second Edition (Sibley Guides)

The Sibley Guide to Birds, 2nd Edition (Sibley Guides)