The African wild ass (Equus africanus) is the ancestor of the domestic donkey, and has a similar stocky body shape. The short, smooth coat is a light grey to fawn colour, fading to white on the undersides and legs. Both subspecies have a dark stripe across their back and the Somali wild ass (E.a.somalicus) also has horizontally striped legs like those of a zebra. The ears are large and bordered by black whilst the thick, upright mane is also black at the tip. There are only a few hundered African wild ass left in the wild. The African wild ass can survive water loss of up to 30% of its body weight and drink enough water to replace it in under 5 minutes. Interbreeding with the domestic donkey is a serious threat to the African wild ass.