Burchell's zebra herd (Equus burchelli) walking towards Rietfontein waterhole. These wild horses are found on the grassy plains of eastern and southern Africa. They live in herds of several hundred individuals, and are always to be found close to a water source. They eat grass, leaves and shoots. Zebras are an important prey animal for large carnivores such as lions, although they can outrun them over long distances. When fleeing from predators they remain together in a close-knit group. This behaviour, combined with their striped patterning, may make it more difficult for a predator to select a target. Photographed in the Etosha National Park, Namibia.