Whales, Dolphins, and Porpoises Mark Carwardine
For beginners and established enthusiasts alike the Dorling Kindersley Handbook of Whales Dolphins and Porpoises explains where in the world to look for cetaceans how to find them how to tell one species from another and how to interpret their different forms of behaviour. A visual colour key at the front of the book aids immediate identification in the wild then guides you to the detailed species entry.