The ellipsis waterbuck, often called the common or ringed waterbuck, is the form of waterbuck known for the white elliptical ring around the rump. It originated in eastern and southern Africa near rivers, lakes, and floodplains. Mature males may weigh 440–660 pounds, while females are smaller, often 350–460 pounds; shoulder height is around 47–54 inches. The coat is coarse gray-brown, darker with age, and males carry long ridged horns. This antelope is water-dependent, social, and usually remains near cover. U.S. introduction was through zoos, safari parks, and exotic ranches during the mid-to-late 20th century. (Animal Diversity Web)