Die white-throated rail (Dryolimnas cuvieri) or Cuvier's rail, is a species of bird in the family Rallidae.
Verbreitung
BearbeitenIt is found in the Comoros, Madagascar, Mayotte, and Seychelles.
Taxonomie
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The nominate subspecies is found in Madagascar. A flightless subspecies (sometimes considered a distinct species),[1] Dryolimnas (cuvieri) aldabranus (Aldabra rail), inhabits Aldabra, while the semi-flightless subspecies D. c. Abbott (Assumption rail) from Assumption Island went extinct in the early 20th century due to introduced predators.[2] A fourth extinct flightless subspecies or descendant species is known from fossil remains on Aldabra, and anatomically was almost identical to the Aldabra rail. This subspecies was wiped out by rising sea levels during the Pleistocene, but the atoll was recolonized by the white-throated rail after it resurfaced; this population evolved in a very similar way to the extinct subspecies, eventually evolving into the modern Aldabra rail. This is one of the very few observed instances of iterative evolution, in which a distinct population is wiped out from an area but it is recolonized by members of the source population, who evolve in the same way as the extinct population.[3][4]
It is now the last living member of the genus Dryolimnas, and the
Aldabra-Ralle
BearbeitenWeißkehlralle oder Cuvier-Ralle (Dryolimnas cuvieri aldabranus)Aldabra subspecies is believed to be the last flightless bird in the Indian Ocean.[5] It's natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical mangrove forest.
Literatur
Bearbeiten- Daniel Lingenhöhl: Vogel kehrte von den Toten zurück. In: Spektrum.de. 13. Mai 2019.
Aldabra-Atoll im Indischen Ozean, nordwestlich von Madagaskar gelegen, ist ein biologisches Wunderland: Die Koralleninseln beherbergen beispielsweise die größte Zahl an lebenden Riesenschildkröten auf der Erde – etwa 100 000 Giganten ziehen hier gemächlich ihre Kreise. Und sie sind die Heimat der letzten flugunfähigen Vögel, die auf Inseln im Indischen Ozean überlebt haben. Mehrere hundert bis mehrere tausend Exemplare einer Unterart der Cuvier-Rallen (Dryolimnas cuvieri aldabranus) leben auf den flachen Inseln des Archipels – eine evolutionäre Besonderheit, wie Julian Hume vom Natural History Museum in Tring und David Martill von der University of Portsmouth im »Zoological Journal of the Linnean Society« berichten
Einzelnachweise
Bearbeiten- ↑ Seychelles Islands Foundation working to classify Aldabra Rail as a separate species. In: www.seychellesnewsagency.com. Abgerufen am 11. Mai 2019.
- ↑ Extinct Birds|last=Hume|first=Julian P.|publisher=Bloomsbury Natural History|year=2017|isbn=9781472937445|page=114}}
- ↑ The bird that came back from the dead. In: Science Daily.
- ↑ Hume|first1=Julian P.|last2=Martill|first2=David|title=Repeated evolution of flightlessness in Dryolimnas rails (Aves: Rallidae) after extinction and recolonization on Aldabra|journal=Zoological Journal of the Linnean Society|language=en|doi=10.1093/zoolinnean/zlz018|year=2019|volume=186|issue=3|pages=666–672|url=https://researchportal.port.ac.uk/portal/files/20131781/Repeated_evolution_of_flightlessness.pdf}}
- ↑ Seychelles haven of the giant tortoise. via news.bbc.co.uk, 29. Mai 2018.
Weblinks
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[[Category:Dryolimnas|white-throated rail]] [[Category:Birds of the Comoros]] [[Category:Birds of Madagascar]] [[Category:Birds of Mayotte]] [[Category:Birds of Seychelles]] [[Category:Birds described in 1845|white-throated rail]] [[Category:Taxonomy articles created by Polbot]]