Orang-utans are the world's largest tree- climbing mammals. But their forest habitat in Borneo is rapidly disappearing, putting the future of Asia's only great ape in peril. Staying at Sukau Rainforest Lodge, Richard see first hand how the locals are fighting the threat not only to their environment, but also to the tourism industry. Along the way, Richard sees a range of animals in their natural habitat, and visits one of only 2 sources of birds nest soup.