"These are some of the largest protected areas in this part of Asia and particularly important for conservation because they hold huge potential for recovering wildlife populations including tiger," he said.

The WWF has set up cameras in parts of the forest to capture images of elusive wildlife.

But the last photo they got of a tiger was in 2007.

Conservationists hope that Sadie May and Scooby Doo will find some fresher evidence of wild tigers - and help efforts to save them.