The Sibley Field Guide to Birds of Eastern North America [with] The Sibley Field Guide to Birds of Western North America [Sibley Birds East & Sibley Birds West]

New York: Alfred A. Knopf, 2014. Trade Paperback. Near Fine. Sibley, David Allen. Second editions of both volumes. 2014 Trade Paperback. xxv, 438, [1]; xxv, 477, [2] pp. An exceptionally well-illustrated guide to all bird species in North America, with color illustrations and maps throughout. East: Compact and comprehensive, this guide features 650 bird species, plus regional populations, found east of the Rocky Mountains. Entries include stunningly accurate illustrations - more than 4,600 in total - with descriptive captions pointing out the most important field marks. Each entry has been updated to include the most current information concerning frequency, nesting, behavior, food and feeding, voice description, and key identification features. Here too are more than 600 updated maps drawn from information contributed by 110 regional experts across the continent, and showing winter, summer, year-round, migration, and rare ranges. West: Compact and comprehensive, this guide features 715 bird species, plus regional populations, found west of the Rocky Mountains. Entries include stunningly accurate illustrations - more than 5,046 in total - with descriptive captions pointing out the most important field marks. Each entry also includes the most current information concerning frequency, nesting, behavior, food and feeding, voice description, and key identification features.