The yak (Bos grunniens), also known as the Tartary ox, grunting ox, hairy cattle, sarlak or sarlyk, or domestic yak, is a species of long-haired domesticated cattle found throughout the Himalayan region, the Tibetan Plateau, Tajikistan, the Pamir Mountains, and as far north as Mongolia and Siberia. It is descended from the wild yak (Bos mutus).