These sure-footed cattle were domesticated hundreds of years ago by people in Asia. Female yaks and their young calves travel in herds of hundreds of animals. The herd protects the young from predators, like wolves. Males are larger than females. Both males and females have horns.
Yaks have a massive, low-slung body, a huge hump on their shoulders, and hoofed feet.
Yaks have very long fur, and during the winter, they also grow a short, thick fur undercoat which insulates them from the cold. They have a life span of about 20 years in captivity. Yaks, like other ruminants, have a four-part stomach.