Includes all mammals and the most common birds, reptiles, amphibians, and invertebrates found in Washington, Oregon, British Columbia, northern California, Idaho, and western Montana More than 180 species described in detail More than 460 color photographs shot in the wild Silhouettes and track keys for quick identification More than 200 original scale drawings of tracks and track patterns 92 range maps Clear color-coded layout Stunning, essential reference for nature enthusiasts of all ages and skill levels