Least Chipmunks are very small, only about 7-8 inches including their tail. They are active runners and skillful climbers. They are found in fields, pine forests, sagebrush desert, or rocky cliff areas. These chipmunks are woodland animals with cheek pouches that are fur-lined, which they use to carry their food. They hibernate with the cached eats consisting of nuts, seeds, fruit, and insects, they will also eat acorns, grasses, and fungi. Least Chipmunks will awaken during hibernation to get some of the stored food, as they do not rely on stored body fat to survive, only enough fat for maintenance. They are generally daytime mammals usually found running around on the ground, although their nests may be underground or in a tree hollow. Here is one on a Ponderosa Pine in northern Arizona.