Cape mountain zebra
The Cape mountain zebra differs slightly from the Hartmann's subspecies, being stockier and having longer ears and a larger dewlap. Adults have a shoulder height of 116 to 128  cm, making them the most lightly built subspecies of zebra. There is slight sexual dimorphism with mares having a mass of around 234  kg and stallions weighing around 250–260  kg.
Cape mountain zebra
The Cape mountain zebra is not territorial, and populations consist of small groups of two types: breeding groups and bachelor groups. A breeding herd consists of a mature stallion and up to five mares and their foals. Stallions that cannot obtain mares associate in less defined bachelor groups. Once established, breeding groups normally stay together for many years; one stallion in the Mountain Zebra National Park is known to have stayed with his herd for more than a decade until he was at least 17 years old. 
Foals leave their herds on their own accord at around 22 months of age, and unlike the Hartmann subspecies whose mares force foals out, stallions of the Cape subspecies actually try to prevent them leaving. This behaviour of foals in free-ranging populations could be a mechanism to prevent inbreeding.