Carpodacus sillemi 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Passeriformes Fringillidae

Scientific Name: Carpodacus sillemi (Roselaar, 1992)
Common Name(s):
English Sillem's Rosefinch, Sillem's Mountain-finch, Sillem's Mountain Finch
Leucosticte sillemi Roselaar, 1992
Taxonomic Source(s): Roselaar, C.S. 1992. A new species of mountain finch Leucosticte from western Tibet. Bulletin of the British Ornithologists' Club 112: 225-231.
Taxonomic Notes: Carpodacus sillemi (del Hoyo and Collar 2016) was previously placed in the genus Leucosticte following Roselaar (1992).

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2017
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Contributor(s): Hornskov, J. & Muzika, Y.
Facilitator/Compiler(s): Benstead, P., Crosby, M., Peet, N., Symes, A., Taylor, J., Westrip, J.
This species is listed as Data Deficient because it is known from only two specimens and a limited number of recent sightings, thus there is insufficient information available for assessment of its threat status.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Carpodacus sillemi was described from two specimens collected in 1929 on a barren plateau at 5,125 m in southern Xinjiang Autonomous Region, China (in an area under Chinese administration but also claimed by India). One of the birds collected was a juvenile with wings not yet fully grown and the collector considered that the birds had either bred close to where they were collected or on the nearby peaks in the Kunlun Shan range. In 2012 it was rediscovered c.1,350 km. away from the type locality in the Yeniugou Valley, in a remote area of western Qinghai, China (Kazmierczak and Mizuka 2012), with further sightings the following year in the Yeniugou Valley (Mizuka 2014). During the 2013 survey the species was not located anywhere apart from in the Yeniugou Valley (Mizuka 2014), and searches elsewhere have failed to find the species (Mizuka 2014, J. Hornskov in litt. 2016). However, the survey did conclude that even at appropriate altitudes the species was very difficult to locate (Mizuka 2014), and so it is presumably localised and scarce.
Countries occurrence:
Present - origin uncertain:
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:155000
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):4950
Upper elevation limit (metres):5125
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:No population estimates are available.

Trend Justification:  The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
Current Population Trend:Stable
Additional data:
Number of mature individuals:UnknownContinuing decline of mature individuals:Unknown
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:The type-locality is a barren plateau at 5,125 m. Sightings in the Yeniugou Valley in 2012 and 2013 were made between 4,950 m and 5,007 m (Kazmierczak and Mizuka 2012, Mizuka 2014). The 2012 and 2013 sightings were made on a damp, south-facing, low-gradient slope with a rich ground vegetation compared to the rest of the area (Mizuka 2014). Both this species and the related C. roborowskii were seen to feeding on this vegetation (Mizuka 2014), and so they may be restricted to areas where this vegetation occurs at sufficient density (Mizuka 2014). The availability of this vegetation may vary seasonally (Mizuka 2014) although there is no current evidence to show whether this species makes any movements. However, it is probably resident at the type-locality, as the adult collected was in full moult in September.

Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):3.5
Movement patterns:Not a Migrant

Threats [top]

Major Threat(s): No threats are known and there are unlikely to be any in the remote area from which it is known.

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
None is known.

Conservation Actions Proposed
Search for species at the type-locality and on other high altitude plateaux in the area.

Amended [top]

Amended reason: Edited Geographic Range, Rationale and Habitats and Ecology Information text. Added elevation range and added Taxonomic Notes and associated references. Also added Contributors and a Facilitator/Compiler. Map revised.

Citation: BirdLife International. 2017. Carpodacus sillemi (amended version of 2016 assessment). The IUCN Red List of Threatened Species 2017: e.T22720493A110427469. . Downloaded on 18 August 2018.
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