- a wild horse, Equus caballus przevalskii, chiefly of Mongolia and Sinkiang, characterized by light yellow coloring and a stiff, upright black mane with no forelock: the only remaining breed of wild horse, it is now endangered and chiefly maintained in zoos.
- a wild horse, Equus przewalskii, of W Mongolia, having an erect mane and no forelock: extinct in the wild, only a few survive in captivity
