The antelopes include the beisa oryx, fairly common and widely distributed; the greater and lesser kudu (the greater kudu is not found on the Ogaden plateau); the Somali hartebeest (Bubalis Swaynei), found only in the Haud and Ogo districts; waterbuck, rare except along the Webi Shebeli and the Nogal; the dol or Somali bushbuck; the dibatag or Clarke's gazelle; the giraffe-like gerenuk or Waller's gazelle, very common; the aoul or Soemmering's gazelle, widely distributed; the dero (Gazella Speki); and the small dikdik or sakaro antelope, found in almost every thicket.
In the Vryheid district the kudu, blue wildebeest, waterbuck, reedbuck, impala, steinbok and klipspringer are also found.
Many species of antelope are found, mostly in small numbers, including the kudu, hartebeest, the sable and roan antelope, the white tailed and the brindled gnu, waterbuck, red buck, duiker, blesbok, palla, springbuck (numerous), steinbok, grysbok and klipspringer.
The waterbuck, Cobus, on the other hand, actually seek refuge from pursuit in the water.
The true waterbuck (C. ellipsiprymnus), and the defassa or sing-sing (C. defassa), are the two largest species, equal in size to red deer, and grey or reddish in colour.
- Waterbuck (Cobus ellipsiprymnus).
WATERBUCK (Wasserbok), the name of a large South African antelope (Cobus ellipsiprymnus) belonging to the subfamily Cervicaprinae, characterized by the white elliptical ring on the buttocks, and the general reddish grey colour of the long and coarse hair.
The name is extended to include the sing-sing or defassa waterbuck (C. def assa), a wides p read species, without the white ring on the buttocks, and represented by several local races, one of which is foxy red while a second is greyish.