This FoldingGuide covers 52 mammals, both large and small, found in the Rocky Mountain Regions. It includes bats, moles, rabbits, as well as the large signature mammals of the region such as elk, bears, foxes, bison, and cougars. The range extends from the front range of the Rockies westward to the Cascade range, northward to include the Canadian Rockies and southward to the Colorado/New Mexico border. Illustrations and text are by Fiona Reid, accomplished naturalist, author and illustrator of the Peterson Field Guide to Mammals, published by Houghton Mifflin Harcourt. She lives in Milton, Ontario.