Amazon.com description: Product Description: The squirrels that live west of the Mississippi are a diverse group of mammals, from large colonies in underground caverns to flying squirrels, sailing through the trees silently at night. Here is a detailed guide to 65 squirrel species, including prairie dogs, woodchucks, and related species, found in Western North America, including the Pacific Northwest, the Rocky Mountains, and the Great Plains. Color illustrations accompany notes on behavior, habitat and ecology of each species, with range maps. Includes glossary and index. A wonderful book for campers and budding naturalists.