Black wildebeest
The black wildebeest or white-tailed gnu ("Connochaetes gnou") is one of the two closely related wildebeest species. It is a member of the genus "Connochaetes" and family Bovidae. It was first described in 1780 by Eberhard August Wilhelm von Zimmermann. The black wildebeest is typically in head-and-body length, and the typical weight is . Males stand about at the shoulder, while the height of the females is . The black wildebeest is characterised by its white, long, horse-like tail. It also has a dark brown to black coat and long, dark-coloured hair between its forelegs and under its belly.
African wild ass
The African wild ass is long and (12 to 14 hands) tall at the shoulders, with a tail long. It weighs between . The short, smooth coat is a light grey to fawn colour, fading quickly to white on the undersides and legs. There is a slender, dark dorsal stripe in all subspecies, while in the Nubian wild ass ("E. a. africanus"), as well as the domestic donkey, there is a stripe across the shoulder. The legs of the Somali wild ass ("E. a. somaliensis") are horizontally striped with black, resembling those of a zebra. On the nape of the neck, there is a stiff, upright mane, the hairs of which are tipped with black. The ears are large with black margins. The tail terminates with a black brush. The hooves are slender and approximately of the diameter as the legs.