Juniper trees are the main source of food, water, and shelter for Stephen's Woodrat. Like Red Tree Voles, which feed mostly on Douglas-fir, the Woodrats are able to feed primarily on conifer leaves, which contain chemical compounds - tannins and terepenoids - that interfere with digestion in most mammals. Learn more about the Neotoma stephensi, more commonly known as a Stephen's Woodrat, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.