The North American Swans - Johnsgard, Paul
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Among birds, swans are relatively long-lived species and are also among the most strongly monogamous, having prolonged pair and family bonds that strongly influence their reproductive and general social behavior, which, in combination with their beauty and elegance, contribute to the overall high degree of worldwide human interest in them. This volume of more than 59,000 words describes the distributions, ecology, social behavior, and breeding biologies of the four species of swans that breed or have historically bred in North America, including the native trumpeter and tundra swans, the…mehr

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Produktbeschreibung
Among birds, swans are relatively long-lived species and are also among the most strongly monogamous, having prolonged pair and family bonds that strongly influence their reproductive and general social behavior, which, in combination with their beauty and elegance, contribute to the overall high degree of worldwide human interest in them. This volume of more than 59,000 words describes the distributions, ecology, social behavior, and breeding biologies of the four species of swans that breed or have historically bred in North America, including the native trumpeter and tundra swans, the introduced mute swan, and the marginally occurring whooper swan. Also included are 5 distribution maps, 15 drawings, 27 photographs by the author, and a reference section of nearly 1,000 literature citations.
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Autorenporträt
Paul Johnsgard is Foundation Regents Professor Emeritus in the School of Biological Sciences at the University of Nebraska. He is the author of about 100 books on ornithology, avian behavior, ecology, and natural history. He is a Fellow of the American Ornithologists' Union and the recipient of lifetime awards from the National Wildlife Federation and the National Audubon Society. His publications have appeared in eight different decades. Tom Mangelsen is a photographer, cinematographer, and filmmaker. He is recognized as one of the world's premier nature photographers, with works appearing in National Geographic, Audubon, Smithsonian, Natural History, Newsweek, Wildlife Art, American Photo, and National Wildlife. His photos have been exhibited around the world and received international awards. He is an advisor and collaborator with Jane Goodall on her African conservation projects.