Siskiyou chipmunks have their own, distinct vocalization: a long, intense, one-syllable call that starts low, rises, and then falls again. It starts at a frequency of about 300 kHz, rises to more than 1,600 kHz, then falls to about 400 kHz. Learn more about the Tamias siskiyou, more commonly known as a Siskiyou Chipmunk, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.