Written and illustrated by David Allen Sibley, America's most widely respected bird illustrator and ornithologist, this FoldingGuide offers instant access to just what birdwatchers need to know. 27 raptors are covered: hawks, falcons, eagles, vultures, and kites. Each entry includes descriptive caption, size, range maps, seasonal occurrence, and in-flight and perched illustrations, all taken from the award-winning The Sibley Guide to Birds, 2nd Edition.