Siskiyou chipmunk

The Siskiyou chipmunk, Neotamias siskiyou, is a small rodent of the squirrel family Sciuridae that lives only in northern California and central Oregon in the United States. Its range is bounded on the south by the Klamath River and on the north by the Rogue River, and in California it is found in Humboldt and Del Norte counties and in Oregon in the Siskiyou mountains. The coat is brown-gray with a pattern of five dark brown and four gray stripes along the back, the central stripe being blackish and darkest, and each cheek carries three brown and two gray stripes. It looks most like Allen's chipmunk and the yellow-cheeked chipmunk, and individuals on the coast tend to be larger and darker than those inland. It is most active early at night, with further peaks in the early morning and the middle of the day, and gives a single-syllable call in an evenly spaced series. It belongs to the Townsend group of western chipmunks, which were once thought to be one species before differences in appearance and a lack of interbreeding showed they were separate.