A groundbreaking guide to flower flies in North America This is the first comprehensive field guide to the flower flies (also known as hover flies) of northeastern North America. Flower flies are, along with bees, our most important pollinators. Found in a varied range of habitats, from backyard gardens to aquatic ecosystems, these flies are of

Everyone's heard of the Great Whites. But most people know little of the hundreds of other types of sharks that inhabit the world's oceans. Written by two of the world's leading authorities and superbly illustrated by wildlife artist Marc Dando, this is the first comprehensive field guide to all 440-plus shark species. Color plates illustrate all species, and detailed accounts include diagnostic line drawings and a distribution map for each species. Introductory chapters treat physiology, behavior, reproduction, ecology, diet, and sharks' interrelationships with humans.

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The most complete and user-friendly photographic field guide to the world's canidsThis stunningly illustrated and easy-to-use field guide covers every species of the world's canids, from the Gray Wolf of North America to the dholes of Asia, from African jackals to the South American Bush Dog. It features more than 150 superb color plates depict