About Equus zebra Linnaeus, 1758
The mountain zebra (Equus zebra) is a zebra species belonging to the family Equidae, native to southwestern Africa. It has two recognized subspecies: the Cape mountain zebra (E. z. zebra), which occurs in South Africa, and Hartmann's mountain zebra (E. z. hartmannae), which is found in south-western Angola and Namibia. Mountain zebras occupy mountain slopes, open grasslands, woodlands, and areas with enough vegetation, but their preferred habitat is mountainous terrain, especially escarpments that support a diversity of grass species. They live in hot, dry, rocky, mountainous and hilly habitats. They favor slopes and plateaus up to 2,000 m (6,600 ft) above sea level, and migrate to lower elevations during winter. Their preferred diet is tufted grass, primarily Themeda triandra. When food is scarce, they browse on bark, twigs, leaves, buds, fruit, and roots. Other grass species they consume include Cymbopogon pospischilii, Heteropogon contortus, Setaria sphacelata, and Enneapogon scoparius. They need to drink every day. During droughts when no surface water is accessible, they commonly dig for groundwater in dry river beds. The Cape mountain zebra and Hartmann's mountain zebra are currently allopatric, meaning their modern ranges do not overlap, so they cannot crossbreed. This was not the case historically; their current separation is the result of population fragmentation after hunters exterminated mountain zebras across South Africa's Northern Cape Province. Historically, mountain zebras ranged along the entire length of the escarpments on southern Africa's west coast, and in the fold mountain region in the south. Even historically, they generally lived on low-productivity land and were never as numerous as plains-dwelling zebra or antelope species. Unlike plains zebras, mountain zebras do not form large herds. Instead, they gather in small family groups made up of one stallion, one to five mares, and their recent offspring. Unmated bachelor males live in separate groups. Mature bachelors attempt to capture young mares to establish their own harems, a behavior that is opposed by the dominant stallion of an existing family group. Mares produce one foal per birth, and foals are weaned onto solid forage over approximately three years. Cape mountain zebra foals typically leave their maternal herd between 13 and 37 months of age. For Hartmann's mountain zebra, mares attempt to expel their foals when the young are around 14 to 16 months old. After leaving their maternal herd, young males may wander alone for a time before joining a bachelor group, while young females either join an existing breeding herd or pair with a bachelor male to form a new breeding herd.
