The ultimate illustrated field guide for watching whales, dolphins, and porpoises in North Americapractical, portable, comprehensive, and up to dateThis outstanding field guide covers all 54 species and every subspecies of whale, dolphin, and porpoise that occur off the coasts of North America. It is packed with more than 450 illustrations featuring detailed annotations pointing out important field marks. It also features up-to-date distribution maps and concise text that includes helpful identification tips and information about everything from dive sequences to population sizes. Beautifully designed to ensure quick access to essential identification information, this is a must-have guide for every whale watcher in the United States, Canada, and Mexico.Covers all 54 species and every subspecies of whale, dolphin, and porpoise,Features more than 450 illustrations with detailed annotations pointing out important field marks,Includes concise text, distribution maps, and other information to aid quick, reliable identification