Ornithological Observations in Southern Peary Land, North Greenland, 1973 PDF Download
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Author: Hans Meltofte
Publisher:
ISBN:
Category : Birds
Languages : en
Pages : 680
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Book Description
Author: Hans Meltofte
Publisher:
ISBN:
Category : Birds
Languages : en
Pages : 680
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Book Description
Author: Hans Meltofte
Publisher: Museum Tusculanum Press
ISBN: 9788763511360
Category : Birds
Languages : en
Pages : 60
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Book Description
Author:
Publisher: Museum Tusculanum Press
ISBN: 9788763512251
Category :
Languages : en
Pages : 68
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Author:
Publisher: Museum Tusculanum Press
ISBN: 9788763511469
Category :
Languages : en
Pages : 28
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Book Description
Author: Hans Meltofte
Publisher: Museum Tusculanum Press
ISBN: 9788763511674
Category : Charadriidae
Languages : en
Pages : 48
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Author:
Publisher: Museum Tusculanum Press
ISBN: 9788763511797
Category :
Languages : en
Pages : 48
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Author: Eberhard Gwinner
Publisher: Springer Science & Business Media
ISBN: 3642745423
Category : Science
Languages : en
Pages : 436
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Book Description
E. GWINNER! The phenomenon of bird migration with its large scale dimensions has attracted the attention of naturalists for centuries. Worldwide billions of birds leave their breeding grounds every autumn to migrate to areas with seasonally more favor able conditions. Many of these migrants travel only over a few hundred kilo meters but others cover distances equivalent to the circumference of the earth. Among these long-distance migrants are several billion birds that invade Africa every autumn from their West and Central Palaearctic breeding areas. In the Americas and in Asia the scope of bird migration is of a similar magnitude. Just as impressive as the numbers of birds are their achievements. They have to cope with the enormous energetic costs of long-distance flying. particularly while crossing oceans and deserts that do not allow replenishment of depleted fat reserves. They have to appropriately time the onset and end of migrations. both on a daily and annual basis. And finally. they have to orient their migratory movements in space to reach their species- or population-specific wintering and breeding grounds, irrespective of the variable climatic conditions along their migratory routes.
Author:
Publisher: Museum Tusculanum Press
ISBN: 9788763511810
Category :
Languages : en
Pages : 44
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Author: Ole Bennike
Publisher: Museum Tusculanum Press
ISBN: 9788763511834
Category :
Languages : en
Pages : 28
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Author: J. Burger
Publisher: Springer Science & Business Media
ISBN: 1468446916
Category : Science
Languages : en
Pages : 433
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Book Description
Among birds, shorebirds provide some of the more unique opportunities to examine basic problems in behavior, ecology, and evolution. This is in large measure due to the diversity, both behaviorally and ecologically, of a group closely related taxonomically and distributed throughout the world. The overall aim of these two volumes is to provide a representative selection of current research being conducted on shorebird behavior and ecology. Traditionally, marine birds have included those species that breed in large colonies on offshore islands along coasts (see Volume 4 of this series). Although shorebirds have generally not been considered within this group, the fact that almost 40% of the species breed along coasts and more than 60% often or always spend the nonbreeding season in coastal habitats more than justifies their inclusion as marine birds (at least those species that totally or partially depend upon the marine environment). Their inclusion markedly increases species diversity in marine birds since shorebirds add about 217 species to the 280 that are traditionally thought of as marine.
