The most comprehensive field guide available to North American mammals--a must-have for any enthusiast's day pack or home library--from the go-to reference source for over 18 million nature lovers.

From a stop-action photograph of the amazing flying squirrel to Big Horn Sheep perched on a rock face, this guide puts the world of mammals in your hands. Illustrated with more than 300 full-color photographs, each species account includes information on physical characteristics, size, similar species, breeding, tracks and other signs, habitat, and range, as well as commentary on feeding, nesting, and other behaviors. Easy-to-read range maps, detailed anatomical illustrations of different mammals, track illustrations, and a state-by-state location guide make this the decisive authority on North American mammals.