The herds of bison, antelope and elk that once roamed the prairies have vanished, but a few mountain sheep still graze on the grass-covered mesas in inaccessible portions of the Bad Lands.
Many species of antelope are found, mostly in small numbers, including the kudu, hartebeest, the sable and roan antelope, the white tailed and the brindled gnu, waterbuck, red buck, duiker, blesbok, palla, springbuck (numerous), steinbok, grysbok and klipspringer.
In some respects connecting the last group with the Cervicaprinae is the rhebok, or vaal-rhebok (Pelea capreolus), a grey antelope of the size of a roebuck, with small upright horns in the bucks recalling those of the last group, and small lateral hoofs, but no face-glands.
The moose and red deer are found in the wooded regions, and the jumping deer and antelope on the prairies.
The group is represented in India by the chousingha or four-horned antelope (Tetraceros quadricornis), generally distinguished by the feature from which it takes its name (see Duiker).
The second group, which is mainly African, but also represented in Syria, is that of the Hippotraginae, typified by the sable antelope (Hip potragus niger) and roan antelope (H.
This class includes the elephant (now found only in the Knysna and neighbouring forest regions), buffalo and zebra (strictly preserved, and confined to much the same regions as the elephant), eland, oribi, koodoo, haartebeest and other kinds of antelope and gnu.
In the open country the mule deer, the pronghorn antelope and the coyote are found, and the bison formerly ranged over the north-eastern part of the state; the side-striped groundsquirrel, Townsend's spermophile, the desert pack-rat and the desert pack-rabbit inhabit the flat country.
The elephant, giraffe, lion, leopard, hyena, zebra, buffalo, gnu, quagga, kudu, eland and many other kinds of antelope roamed the plains; the rhinoceros, hippopotamus and crocodile lived in or frequented the rivers, and ostriches and baboons were numerous.
Possibly this handsome antelope may be the original of the mythical unicorn, a single buck when seen in profile looking exactly as if it had but one long straight horn.