• Anglický jazyk

Lists of birds

Autor: Source: Wikipedia

Source: Wikipedia. Pages: 111. Chapters: List of extinct birds, List of birds, List of birds of Kerala, List of introduced bird species, List of birds by common name, List of Amazon parrots, List of parrots, Wildlife of Phitsanulok Province, List of national... Viac o knihe

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Source: Wikipedia. Pages: 111. Chapters: List of extinct birds, List of birds, List of birds of Kerala, List of introduced bird species, List of birds by common name, List of Amazon parrots, List of parrots, Wildlife of Phitsanulok Province, List of national birds, List of chicken breeds, List of hummingbirds, List of procellariiformes, List of Aratinga parakeets, List of Kakapo, List of birds displaying homosexual behavior, List of antbirds, List of Procellariidae, List of pigeon breeds, List of official city birds, List of endemic bird areas of the world, List of birds in Mont-Tremblant National Park, List of secondary endemic bird areas of the world, List of historical and fictional birds, List of hummingbirds in taxonomic order, List of shearwaters, List of Tinamidae, List of birds of Singanallur lake, List of gadfly petrels, List of goose breeds, List of nightjars, List of reserves for waterbirds and migratory birds in Switzerland, List of Australian bird emblems, List of birds by flight speed, List of Strigopidae, List of macaws, List of prions, List of duck breeds, Endemic birds of Japan, List of fulmarine petrels, List of moa, List of turkey breeds, List of soaring birds, List of Casuariidae, AOU Checklist of North American Birds. Excerpt: Since 1500, over 190 species of birds have become extinct, and this rate of extinction seems to be increasing. The situation is exemplified by Hawaii, where 30% of all known recently extinct bird taxa originally lived. Other areas, such as Guam, have also been hit hard; Guam has lost over 60% of its native bird taxa in the last 30 years, many of them due to the introduced Brown Tree Snake. There are today about 10,000 species of birds, with roughly 1,200 considered to be under threat of extinction. Island species in general, and flightless island species in particular are most at risk. The disproportionate number of rails in the list reflects the tendency of that family to lose the ability to fly when geographically isolated. Even more rails became extinct before they could be described by scientists; these taxa are listed in Later Quaternary Prehistoric Birds. The extinction dates given below are usually approximations of the actual date of extinction. In some cases, more exact dates are given as it is sometimes possible to pinpoint the date of extinction to a specific year or even day (the San Benedicto Rock Wren is possibly the most extreme example-its extinction could be timed with an accuracy of maybe half an hour). Extinction dates in the literature are usually the dates of the last verified record (credible observation or specimen taken); in many Pacific birds which became extinct shortly after European contact, however, this leaves an uncertainty period of over a century because the islands on which they used to occur were only rarely visited by scientists. King Island EmuThe Ostrich and related ratites. The taxonomy of the elephant birds is not fully resolved; it is certain that at least one taxon survived until some 1000 years ago at least. Judging from geographical data, A. maximus and the smaller A. medius are possibilities. Generally believed to have been extinct by 1500, this is the only Moa species that according to current knowledge might have surviv

  • Vydavateľstvo: Books LLC, Reference Series
  • Rok vydania: 2011
  • Formát: Paperback
  • Rozmer: 246 x 189 mm
  • Jazyk: Anglický jazyk
  • ISBN: 9781156522615

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