Orangutan attempts to hunt fish with spear

An orangutan clings precariously to overhanging branches in a desperate bid to spear a passing fish. It is the first time one has been seen using a tool to hunt. The image taken in Borneo on the island of Kaja is part of a series taken for a new book, The Thinkers Of The Jungle, which also includes the first photograph of an orangutan swimming. (Photo: cri.cn)