The African Waterbuck is a large antelope native to sub-Saharan Africa. It is a member of the Cervidae family and is known for its distinctive white circle around its rump. The Waterbuck is a grazer and is typically found near water sources such as rivers and lakes
From Wikipedia
The waterbuck is a large antelope found widely in sub-Saharan Africa. It is in the genus Kobus of the family Bovidae. It was first described by Irish naturalist William Ogilby in 1833. Its 13 subspecies are grouped under two varieties: the common or ellipsiprymnus waterbuck and the defassa waterbuck. Their coat colour varies from brown to grey. The long, spiral horns, present only on males, curve backward, then forward, and are 55–99 cm (22–39 in) long.