Who knows? I sure don’t.

Most “wild” horses today, such as the American Mustang or the Australian Brumbies, are actually feral animals, horses that were once domesticated but escaped and reverted to an apparently wild status. The Przewalski’s Horse, on the other hand, has never been successfully domesticated and remains a truly wild animal today. There were once several types of equid that had never been successfully domesticated, including the Tarpan, Onager, and others. However, most have become extinct, with the Przewalski’s Horse the only remaining truly wild horse in the world.

Poliakov, who concluded that the animal was a wild horse species, gave it the official name Equus przewalskii (Poliakov 1881). However, authorities differ about the correct classification. Some hold it is a separate species, the last remnant of the wild horse Equus ferus, others hold it is a subspecies of Equus caballus. The question will only be answered with finality if or when the common ancestor from which domestic and Przewalski’s horses diverged is determined.^[2] Although the Przewalski’s horse has 66 chromosomes, compared to 64 in a domestic horse, the Przewalski’s horse and the domestic horse are the only equids that cross-breed and produce fertile offspring, possessing 65 chromosomes.

Przewalski’s Horse is stockily built in comparison to domesticated horses, with shorter legs. Typical height is about 13 hands (1.32 m), length is about 2.1 m with a 90 cm tail. They weigh around 350 kg. The coat is similar to Dun coloration in domestic horses. It varies from dark brown around the mane (which stands erect) to pale brown on the flanks and yellowish-white on the belly. The legs of the Przewalski’s Horse are often faintly striped