Animals with Cameras - Brown Bears, Mantas and Sheep Dogs

In the heart of the Atlantic, Gordon joins a team looking to discover why huge numbers of devil rays, fish with `wings' nearly four metres across, gather every summer near the Azores archipelago. In northeast Turkey cameras are carried by brown bears as part of a study trying to understand why so many bears survive in a small patch of forest. Meanwhile, in southern France, on-board cameras help scientists trying to prove that guard dogs can help protect sheep flocks from wolf attacks.