The common eland is the slowest antelope, with a peak speed of 40 kph that tires them quickly. However, they can maintain a 22 kph trot indefinitely. Elands are capable of jumping up to 2.5 m from a standing start when startled. The common eland’s life expectancy is generally between 15 and 20 years. Eland herds are accompanied by a loud clicking sound that has been subject to considerable speculation. It is believed that the weight of the animal causes the two halves of its hooves to splay apart, and the clicking is the result of the hoof snapping together when the animal raises its leg. The sound carries some distance from a herd and may be a form of communication.