Cliff chipmunk fossils about 2,300 and 8,000 years old have been found in caves in Utah and Nevada. The chipmunks still live in those states, in habitats where sagebrush, fourwing saltbush, chokecherry, wild rose, and cliffrose grow. Learn more about the Tamias dorsalis, more commonly known as a Cliff Chipmunk, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.