A compact, geographically-specific version of the Sibley Guide with all-new range maps, the same glorious illustrations and expanded, extremely valuable descriptions of each bird with status, habitat, range, voice and identifying marks. The book covers 703 species of birds occurring west of the Rockies, including Alaska, the western Canadian provinces, Baja California and portions of northern Mexico. Maps show the range throughout North America. For birders living east of the Rockies, you'll want to use Sibley's "Birds of Eastern North America" (USE262).  (USW418, $19.95)