Hummingbirds of North America (Peterson Field Guides)

Covering 31 North American species, with more than 250 color photos and 33 maps, this is the most comprehensive field guide to hummingbirds. It has the detail needed for making difficult identifications, and it includes introductory chapters on the natural history of hummingbirds, ways to attract and feed them, and the major North American hot spots for watching these birds.