4Designed to fit in a backpack or pocket for easy access, each of these handy and popular bird field guides comprises 272 pages and features about 175 birds organized by family as approved by the American Ornithological Union. Standard features include: Locator Map at the front listing regional birding hotspots; Introduction by an expert on where to find the state''s top birds; How-To-Use Section with general tips on birding and advice on making the most of the guide; 125 Easy-Access Individual Entries providing a photograph of the bird in its habitat, recognition clues, specific details on behavior, habitat, and local sites, plus a special Field Note with artwork for extra help in tricky identifications; Alphabetical Index with life list; and Color-coded Index. Pennsylvania offers a winning variety of city and country birds. See the bright-colored, vocal Yellow-billed Cuckoo; the migratory Snow Goose; the stunning Red-Tailed Hawk; the olive Acadian Flycatcher, and more.