The Danum Valley, a primary rainforest jungle, is far removed from human habitation. Renowned for its rich variety of both plants and wildlife, Borneo's mammals include such extremely rare and endangered species as the Sumatran Rhino, Benteng Elephant, Clouded Leopard, Bornean Gibbon, and Leaf Monkey. The Orangutan and Proboscis Monkey are both found only in Borneo. Bird life is equally extensive and varied with over 275 individual species having been recorded, giving Danum Valley a reputation for being one of the best places for viewing Borneo's wildlife.