rd numbers to the fascinating pastime of birding. National Geographic has been meeting their need for clear and accurate information for 25 years with our million-selling Field Guide to the Birds of North America. Now, to better serve the expanding market, we've customized our field-guide format to offer unique coverage for birders east or west of the Rocky Mountains. These new volumes deliver in-depth information on every bird officially recorded in the specified area, with illustrated accounts of the different plumages and life stages, along with hundreds of color-coded range maps.

Unique features set these guides apart from the competition and promise to win a new generation of readers: A full-color visual index, printed on the inside covers, makes the content accessible visually --a real boon to beginning and intermediate birders. Annotated artwork highlights birds' key physical features, making identification easier. Thumb-tabs help readers find information fast. Durable covers stand up to outdoor use, with integrated quick-reference flaps that double as place-markers.Field Guide to the Birds of Western North America offers 750 regular species, 600 new range maps, 100 casual and accidental birds, and 55 rarities.