Przewalski's Horse, the last surviving species of wild horse. It is believed to be an ancestor of the domestic horse. Przewalski's horse was first described in 1881 by Nicolai Przewalski (or Przhevalski), a Russian explorer, who saw it in Central Asia.

Przewalski's horse was formerly widespread over Europe and northern Asia from the Ural Mountains to Mongolia. It became extinct in the wild around 1970, mainly because of reduction of its habitat by farmers. Przewalski's horse was reintroduced into the wild in 1994, when a number of individuals bred in captivity were released in a nature reserve in Mongolia.

Przewalski's horse is four feet (1.2 m) high at the shoulder and has a big head, short neck, and a stocky build. It is dun-colored with a dark, upright mane, dark tail, and a dark stripe down its back.

Przewalski's horse is Equus przewalskii of the horse family, Equidae.