There are six species of "Kobus" Waterbucks, all African water-/marsh-loving antelopes. An oily secretion waterproofs their legs.
Male Waterbucks are larger than females, often darker and have large horns.
Shown is the Common Waterbuck native to south and central Africa.
There are two subspecies of Common Waterbuck, which interbreed where ranges overlap. Above is Kobus ellipsiprymnus ellipsen,
with its distinctive and comical pale circle on its bottom.
The Common Waterbuck above is Kobus ellipsiprymnus defassa. It is native to central Africa (west to east sub-Sahara) and
does not have the white circle on its rump but has a white bottom.
More "defassa" waterbucks.