There are two subspecies of mountain zebras in South Africa which live on rough, rocky highlands, but once also occurred in large numbers in the grassy lowland plains. The Cape mountain zebra of South Africa is the smallest zebra, standing about 4 ft (1.2 m) at the shoulder and weighing about 600 lb (272 kg). The stripes of the Cape mountain zebra are slightly wider and shorter than those of the other subspecies, Hartmann's mountain zebra of Namibia. The Cape mountain zebra has a dewlap under the lower jaw, which other zebras do not have.
Herds of the common zebra readily mix with herds of wildebeest, but Cape mountain zebras tend to keep apart from other animals. Hartmann's zebras have the ability to locate water in apparently dry valleys.