|No, I'm not pregnant|
|A male and his harem|
The babies are born much darker in color than the adults. They start out a blue/black color and gradually change to the rusty red color of the adults.
They also have a long non-prehensile tail which is used mainly for balance. They are equally at home in the trees or in water, being able to swim long distances, as well as leap long distances in the trees.
But sadly even though they are a versatile species, they are severely endangered. There are only an estimated 1000 left in the wild. They are threatened by the same problems that plague other Indonesian species like Orangutans, Elephants, Rhinos, etc. Habitat loss due to the inefficient management of palm oil production is driving more and more species toward extinction. So look for Orangutan safe palm oil, and you'll be helping their cousins the proboscis monkey's too.