Yak

The yak (Bos grunniens) is a long-haired humped domestic bovine found in Tibet and throughout the Himalayan region of south Central Asia, as well as in Mongolia. In Tibetan, the word yak refers only to the male of the species; a female is a dri or nak. In most languages which borrowed the word, including English, however, yak is usually used for both sexes.

Wild yaks stand about two meters tall at the shoulder. Domestic yaks are about half that height. Both types have long shaggy hair to insulate them from the cold. Wild yaks can be either brown or black. Domesticated ones can also be white. Both males and females have horns.