hard to stalk. The troop has a sentinel who stands on the alert while the others are searching for food or resting. When pursued they let out throaty grunts and roars. A full grown male makes a loud wahoo sound. They jump and bound along over the rocks with amazing speed. Its difficult to shoot one while they move thus as they do not run in a straight line but bound up and down and to both sides in a rolling motion. The leader of the troop barks orders to the others. If any member is in trouble, the old leader will come to his assistance. Usually all the elders of a troop will come to the assistance of any member in trouble. They love to sit on ledges to sun themselves. I've watched a whole troop on a ledge watch me swimming. They were very human like in some of their actions. Young ones scampered and played about. Some sat with their arms about each other. Their food, spammed from dung, is mainly composed of insects, Aporions, leaves, and vegetable matter. They have certain places where they collect and deposit their dung. They favor caves, ledges, and cliffs overlooking streams or waterholes.