About the Author

SIR CHRISTOPHER LEVER, Bt has been studying and writing about the history and ecology of naturalized animals, on which he is now the world authority, for nearly 50 years. His books include Naturalized Mammals, Birds, Fishes, and Reptiles and Amphibians of the World (4 volumes), Mandarin Duck, Cane Toad and Naturalized Animals. He is a frequent contributor to many journals and newspapers, including New Scientist, BBC Wildlife, BirdLife, The Times, Country Life and Illustrated London News. A dedicated conservationist, he is deeply concerned with the conservation of the environment and of the ever-decreasing stocks of the world's fauna and flora. He is Honorary Life President of the Tusk Trust, the leading UK NGO involved exclusively with conservation and community programmes in Africa.