The eastern chipmunk [Tamias striatus] is a chipmunk species found in eastern North America. It is the sole living member of the chipmunk subgenus Tamias, sometimes recognised as a separate genus. The name “chipmunk” comes from the Ottawa word ajidamoonh or the Ojibwe word ajidamoo, which translates literally as “one who descends trees headlong.”
A small species, it reaches about 30 cm in length including the tail, and a weight between 66 and 150 g. It has reddish-brown fur on its upper body and five dark brown stripes contrasting with light brown stripes along its back, ending in a dark tail. It has lighter fur on the lower part of its body. It has a tawny stripe that runs from its whiskers to below its ears, and light stripes over its eyes. It has two fewer teeth than other chipmunks and four toes each on the front legs but five on the hind legs.