Wildlife travel

John McCarthy explores wildlife travel with naturalist and tv presenter, Mark Carwardine, who has spent thirty years travelling around the world to observe and aid conservation of a huge range of species including whales, tigers, gorillas and sea birds. He is also joined by wildlife travel writer, James Parry, who has made a unique tour of the world's top twenty deserts chosen for their outstanding wildlife and landscape interest - and award-winning wildlife photographer, Andy Rouse, discusses his recent trips to Rwanda in relation to mountain gorillas, and to India to study tigers. Producer: Margaret Collins.