A team of experts set up camera traps in the Wehea forest, on the eastern tip of Borneo island, in June, hoping to capture images of clouded leopards, orangutans and other wildlife known to congregate at several mineral salt licks. The pictures that came back caught them by surprise – groups of monkeys none had ever seen.
http://www.foxnews.com/scitech/2012/01/20/monkey-feared-extinct-rediscovered/