The Tibetan blue bear or Tibetan bear (Ursus arctos pruinosus) is a subspecies of the brown bear (Ursus arctos) found in the eastern Tibetan plateau. It is also known as the Himalayan blue bear, Himalayan snow bear, Tibetan brown bear, or the horse bear. In Tibetan it is known as Dom gyamuk. One of the rarest subspecies of bear in the world, the tibetan blue bear is rarely sighted in the wild. The blue bear is known in the west only through a small number of fur and bone samples. It was first classified in 1854.