Proboscis << proh BOS ihs >> monkey is a large, leaf-eating monkey that lives on the island of Borneo in Southeast Asia. It gets its name from its proboscis (long nose). A male weighs up to 52 pounds (24 kilograms), and a female weighs up to 26 pounds (12 kilograms). These monkeys are from about 21 to 30 inches (53 to 76 centimeters) long, not including the tail.
Adult proboscis monkeys have reddish hair on their heads, backs, shoulders, and thighs, and pale gray hair on the arms and legs. Infant monkeys are born with silver-blue fur that turns gray after about three months. Proboscis monkeys have sharp back teeth that enable them to shred leaves easily. They have a well-developed thumb adapted to picking leaves and other plant parts. These monkeys live in trees near rivers. They feed mainly on leaves and also eat fruits and flowers. 
Proboscis monkeys are good swimmers. Crocodiles prey on them in rivers and streams. But clearing of trees in the monkeys’ environment for agricultural purposes is the main threat to the animal’s existence.
