The Himalayan brown bear (Ursus arctos isabellinus), also known as the Himalayan red bear, isabelline bear or Dzu-Teh, is a subspecies of the brown bear and is known from northern Afghanistan, northern Pakistan, northern India, west China and Nepal. It is the largest mammal in the region, males reaching up to 2.2 m (7 ft) long, while females are a little smaller. The bears are omnivorous and hibernate in dens during the winter. While the brown bear as a species is classified as Least Concern by the IUCN, this subspecies is critically endangered and populations are dwindling.