Commonly called the impala, the reddish-brown African antelope is renowned for its speed and jumping ability. They can jump over obstacles as high as 3 meters high (9′ 8″) and can make leaps of 10 meters (33′) at a time. They are not a very large animal. The horned male impala only reaches a maximum height of 36 inches at its shoulder. Even with this amazing ability, the impalas’ preferred method of avoiding predators is hiding in the tall Savannah grass. Despite this incredible leaping and jumping ability, zoos are able to pen Impalas with a relatively small fence, some as low as four or five feet. As long as its solid and the Impalas are unable to see where their feet will land on the other side, they will not risk the jump. So they remain captive. If impalas are mixed with other animals that are not affected in the same way by a solid fence, then zoos need to build an extremely tall wire fence to keep the impalas captive — because they …