Zebra duiker (Cephalophus zebra).—Kenneth W. FinkThe National Audubon Society Collection/Photo Researchers
Any of 19 species of small, shy antelope. They live in most of Africa but are rarely seen by humans. The gray, or bush, duiker (Sylvicapra grimmia) has long legs and lives where there is bush or grass cover. It stands 22–26 in. (57–67 cm) tall at the shoulder. Only males have horns, which are short and straight. Forest duikers (18 species, genus Cephalophus) are short-legged, hunchbacked animals that live in dense brush and in forests. They stand 14–18 in. (36–46 cm) tall and vary from pale brown through reddish brown to nearly black. Both sexes have short, straight horns.