Domesticated yaks (Bos Grunniens or the grunting ox) are thought to have been domesticated by Qiang herdsmen on the Tibetan (Qinghai) Plateau around 4,500 years ago. The Tibetan culture of the Himalayan Plateau is intertwined with yak just as Native American Plains Indian culture is intertwined with the American Bison.
Zebras are a keystone species in the Kalahari; they are a source of food both for predators such as lions and for scavengers such as brown hyenas and whitebacked vultures. Shown here are birds surveying an injured animal on the Makgadikgadi grasslands. (Adrian Bailey).
All three species of zebra feature black and white stripes and live in Africa. The plains zebra and the mountain zebra resemble horses, while the Grevy's zebra is related to the ass. Grevy's zebras live in semi-desert areas. Tough grasses form the bulk of this endangered zebra's diet. They also eat plenty of leaves, which can sometimes form up to 30 percent of their diet.