The Rocky Mountains are home to all kinds of mammals, from powerful grizzly bears and iconic bighorn sheep to tiny rodents like shrews and voles. Many of these animals are secretive and difficult to spot, but with a little curiosity and awareness, everyone can learn to watch for them. With this field guide, learn about 85 mammal species that live in the Rockies, including tips on identification, where to look for them and what to watch for.