Zebras are also notoriously difficult to catch. They have evolved superb early-warning mechanisms , such as peripheral vision far superior to other horses. Often bad tempered, they grow increasingly antisocial with age and once they bite, they tend not to let go. A kick from a zebra can kill — and these creatures are responsible for more injuries to American zookeepers each year than any other animal...
Zebra and other African game evolved characteristics to help them survive one of the harshest environments on earth.
A pattern emerged. African herbivores were simply too aggressive for human control. Elsewhere in the world, mammals evolved in isolation from human interference — after all, man only lived outside of Africa for a fraction of his existence on earth-- around 50,000 years. When man arrived in Eurasia and in the Americas, native herbivores were by nature less cautious and more receptive to human control.
But in Africa, man and beast have evolved alongside one another for millions of years. Large mammals have learned to avoid — or if necessary, attack — human beings, resisting capture with some of the most sophisticated physiological characteristics on earth.