Monkey Fact Monday: Who can guess this monkey?

I have a fact quiz for you!

Below is a picture of a monkey -- who can guess what type it is?

Clues: This monkey primarily eats fruits, but occasionally eats leaves and other organic things. They are an important food source due to their large size and are widely hunted by local human populations; they are also threatened by habitat destruction due to logging and land clearing.

It also has a very long tail which it uses to help swing around.

Here is another little hint: Its name comes from a bug.
-yeti321