How does the rump marking of the Defassa Waterbuck (*Kobus defassa*) differ from the Common Waterbuck (*Kobus ellipsiprymnus*)?
The Defassa Waterbuck possesses a much broader white patch covering the entire rump area.
A crucial element in distinguishing between the two main subspecies lies in the configuration of the white marking located around the rump area. The Common Waterbuck, identified scientifically as *Kobus ellipsiprymnus*, is characterized by a distinct, clearly visible white ring encircling the region around the tail. In contrast, the Defassa Waterbuck (*Kobus defassa*), typically inhabiting regions further west, exhibits a significantly different pattern; instead of a ring, this subspecies displays a much broader expanse of white that covers the whole rump area, making the marking much more substantial than the ring seen on the Common Waterbuck. Noting the clarity and extent of this rump feature is essential for accurate field identification.
