(Latin taxonomic nomenclature: Equus ferus przewalskii; also: Przewalski's horse, Takhi; named for the Russian military officer and explorer Nikolai Przewalski, 1839-1888, who first described it, in 1878)
The only surviving species of wild horse, originally native to the Mongolian plains. Since the 1960s, the Przewalski horse is no longer found in the wild, surviving only in animal preserves and zoos. Attempts are being made to restore the species to its natural habitat.
The Przewalski horse weighs c. 350 kg, and is 120-140 cm tall at the shoulder. In colour, it is yellowish-brown, with a light patch around the mouth. Its head is large and somewhat less delicate than regular horses. The mane, like that of the donkey, is short and black, with no forelock. The tail, likewise, is similar to that of the donkey - however, the overall appearance is of a horse-like animal, not donkey-like.
With a chromosome count of 66 (two more chromosomes than the domestic horse), it is nevertheless interfertile with its domestic cousin.