Wild horses are found today only in Africa and Asia—and in zoos, of course. Only zebras, wild asses, and Mongolian wild horses are true wild horses. All other horses and donkeys are called domestic horses. They are different from wild horses because people have changed their anatomy and behavior over the years by careful breeding and training. Domestic horses that escape or are set free into the wild are called feral horses. They are not really wild horses.

All horses, domestic and wild, are related closely enough to be included in a single general scientific category—the genus Equus. Very young horses (until about one year old) are called foals. After one year, a young male is called a colt, and a young female is known as a filly. Adult males are stallions, adult females are mares.

Wild horses are found today only in Africa and Asia—and in zoos, of course. Only zebras, wild asses, and Mongolian wild horses are true wild horses. All other horses and donkeys are called domestic horses. They are different from wild horses because people have changed their anatomy and behavior over the years by careful breeding and training. Domestic horses that escape or are set free into the wild are called feral horses. They are not really wild horses.

All horses, domestic and wild, are related closely enough to be included in a single general scientific category—the genus Equus. Very young horses (until about one year old) are called foals. After one year, a young male is called a colt, and a young female is known as a filly. Adult males are stallions, adult females are mares.