White-throated rail

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White-throated rail
White-throated rail (Dryolimnas cuvieri cuvieri).jpg
D. c. cuvieri, Ranomafana National Park
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Gruiformes
Family: Rallidae
Genus: Dryolimnas
Species:
D. cuvieri
Binomial name
Dryolimnas cuvieri
(Pucheran, 1845)

The white-throated rail (Dryolimnas cuvieri) or Cuvier's rail is a species of bird in the family Rallidae. It is found in Comoros, Madagascar, Mayotte, and Seychelles. A flightless subspecies (sometimes considered a distinct species)[2], Dryolimnas (cuvieri) aldabranus (Aldabra rail), inhabits Aldabra, while a semi-flightless subspecies D. c. abbotti (Assumption rail), from Assumption went extinct in the early 20th century due to introduced predators.[3] 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.[4]

It is now the last living member of the genus Dryolimnas and believed to be the last flightless bird in the Indian Ocean.[5] Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical mangrove forest.

However, in a recent development of a fossil study conducted at the University of Portsmouth and Natural history museum discovered that the extinct species of the bird had in fact has resurrected in a process the experts termed as 'iterative' evolution[6]. It has been found inhabiting isolated coral island called Aldabra. In the absence of predators on the island the re-evolved species of the rail has lost its ability to fly.

References[edit]

  1. ^ BirdLife International (2012). "Dryolimnas cuvieri". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  2. ^ "Seychelles Islands Foundation working to classify Aldabra Rail as a separate species". www.seychellesnewsagency.com. Retrieved 2019-05-11.
  3. ^ Hume, Julian P. (2017). Extinct Birds. 114: Bloomsbury Natural History. ISBN 9781472937445.
  4. ^ Martill, David; Hume, Julian P. "Repeated evolution of flightlessness in Dryolimnas rails (Aves: Rallidae) after extinction and recolonization on Aldabra". Zoological Journal of the Linnean Society. doi:10.1093/zoolinnean/zlz018.
  5. ^ "Seychelles haven of the giant tortoise". 29 May 2018 – via news.bbc.co.uk.
  6. ^ "The bird that came back from the dead | UoP News". Retrieved 2019-05-13.

External links[edit]