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Post by Melly on Feb 24, 2005 0:20:30 GMT
This bird was last seen in 1975. It is officially extinct since the 80s. A photograph is in Errol Fuller's "Extinct birds".
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Post by Melanie on Jun 7, 2005 0:22:59 GMT
DISCOVERED AND LOST WITHIN 20 YEARS: THE STORY OF THE ALDABRAN BRUSH WARBLER Robert Prys-Jones Natural History Museum, Tring, UK The Aldabran Brush Warbler Nesillas aldabrana was discovered in late 1967/early 1968, when a male, female, nest and three eggs were collected on Aldabra Atoll, Indian Ocean, during a year-long Royal Society expedition. The species was not seen again until 1974, in which year RP-J began a two-year field study of a population of circa six individuals, four of which were colour-ringed. The last sighting, of a colour-ringed individual, was in 1983, and the species now appears almost certainly extinct. The presentation will review knowledge of the biology of N. aldabrana and of its status as a species distinct from other Nesillas taxa. The limited data available on the ecology of N. aldabrana itself will then be considered in conjunction with analogous data from other, better-known Indian Ocean island passerines in order to assess the probable cause(s) of its demise.
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Post by Melanie on Jun 7, 2005 0:27:58 GMT
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Post by sebbe67 on Sept 3, 2005 9:49:02 GMT
Aldabra Warbler Nesillas aldabrana was endemic to dense coastal vegetation on Ile Malabar, Aldabra, Seychelles. The species was only discovered in 1967, and the last records were in 1983 Intensive searches in 1986 confirmed that the species was extinct, probably as a result of rat predation and degradation of its habitat by tortoises and goats.
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Post by sebbe67 on Oct 25, 2005 16:59:39 GMT
Sadly, one endemic bird species - Aldabra Warbler Nesillas aldabranus - is probably now extinct. Undiscovered until 1967, except for one record of a bird heard singing, it was only ever known from a 10 ha coastal strip (2 km x 50 m) at the west end of Malabar. A 1974-75 study located five birds: three males and two females (18) and the last sighting, of a single male, was in 1983 (13). At this time it was described as '...almost certainly the rarest, most restricted and most highly threatened species of bird in the world' (5), but by 1994 it was considered extinct (6). It is possible the species might still survive in little-visited and impenetrable south-west Grande Terre, but the chances of this appear increasingly remote. Extinction may have been natural, but rats are also prime suspects given the high level of predation experienced by other species (22).
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Post by another specialist on Oct 25, 2005 19:53:26 GMT
Status Details Endangered Warbler, Aldabra (old world warbler) Nesillas aldabranus Family: Muscicapidae Group: Birds Current Status: Endangered (see below) The Aldabra Warbler (old world warbler) was first listed on January 12, 1995. It is currently designated as Endangered in the Entire Range. Within the area covered by this listing, this species is known to occur in: Seychelles (Aldabra Island). The U.S. Fish and Wildlife Service Foreign (International Affairs) is the lead region for this entity. ecos.fws.gov/species_profile/servlet/gov.doi.species_profile.servlets.SpeciesProfile?spcode=B0AA |
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Post by another specialist on Oct 25, 2005 19:59:53 GMT
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Post by Melanie on Feb 21, 2006 11:59:40 GMT
Taxonomic confusion
Is anyone here who can explain me the following fact?
Nesillas is a genus which is normally included in the Family Sylviidae. But Nesillas aldabrana belongs to the Family Muscicapidae. So how could it be?
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Post by Deleted on Feb 21, 2006 16:13:11 GMT
Hi ! That's an error, it belongs to the Sylviidae.  |
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Post by Melanie on Feb 21, 2006 17:18:26 GMT
Yes, i think the same. So the data in the IUCN redlist must be corrected. Hi ! That's an error, it belongs to the Sylviidae. |
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Post by Carlos on Feb 21, 2006 20:17:59 GMT
The explanation for including genus Nesillas in Muscicapidae comes from the former (no loger valid) taxonomic consideration of some decades ago (up to the sixties) for that family, then a real "super-family" acting as a cul-de-sac for many taxa.
It has now been splitted in many families: Turdidae, Orthonychidae, Timalidae, Panuridae, Picathartidae, Polioptilidae, Sylviidae, Muscicapidae, Platysteiridae, Maluridae, Acanthizitidae, Monarchidae, Eopsaltridae and (if I'm right) even Pachycephalidae.
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Post by Melanie on Feb 21, 2006 21:01:12 GMT
Thanks for the explanation, Carlos. I've written an article about the Aldabran Warbler in the German Wikipedia and i was rather confused after i have compared the taxonomic data from the IUCN redlist with the data from Avibase and other sources.
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Post by sebbe67 on Mar 14, 2006 16:01:47 GMT
Both the photo and the picture is from the book, "Extinct birds" by Errol Fuller   |
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Post by Melanie on Mar 15, 2006 17:22:16 GMT
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Post by sebbe67 on Mar 15, 2006 19:15:19 GMT
The source found by melanie
Only discovered in 1967. No young have ever been seen. After November 1975 only males were seen, and the last sighting was of a lone male in 1983. Described in 1985 as almost certainly the rarest, most restricted and most highly threatend species of bird in the world, by 1994 it was listed as extinct. Rats are prime suspects, being present on Malabar. Cats may also have played a part, and goats may have contributed in reducing the available habitat. On the other hand, this may be a natural extinction, the environment on Aldabra offering little suitable habitat.
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Post by Melanie on Apr 15, 2006 14:39:31 GMT
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Post by sebbe67 on Jun 22, 2006 16:02:04 GMT
The Aldabran Brush Warbler Nesillas aldabrana was discovered in late 1967/early1968, when a male, female, nest and three eggs were collected on Aldabra Atoll,Indian Ocean, during a year-long Royal Society expedition. The species was not seenagain until 1974, in which year RP-J began a two-year field study of a population of circa six individuals, four of which were colour-ringed. The last sighting, of a colour-ringed individual, was in 1983, and the species now appears almost certainly extinct. The presentation will review knowledge of the biology of N. aldabrana and of its status as a species distinct from other Nesillas taxa. The limited data available on the ecology of N. aldabrana itself will then be considered in conjunction with analogous data from other, better-known Indian Ocean island passerines in order to assess the probable cause(s) of its demise.
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Post by sebbe67 on Nov 15, 2006 18:23:59 GMT
Extensive surveys in 2003-2004 located no birds
source: HBW11
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Post by Melanie on Feb 9, 2012 17:33:29 GMT
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Post by Deleted on May 27, 2013 7:20:38 GMT
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