Mark Carwardine is a zoologist, writer, radio and TV presenter, wildlife photographer, whale-watch operator and an active and outspoken conservationist, with a special interest in cetaceans. His TV series include BBC's Last Chance to See with Stephen Fry, and for many years he presented the weekly half-hour programme 'Nature' on BBC Radio 4. Mark writes a monthly column in BBC Wildlife magazine and has written more than 50 books on wildlife and conservation, including Handbook of Whales, Dolphins and Porpoises.