EN
Golden-winged Laughingthrush Trochalopteron ngoclinhense



Taxonomy

Taxonomic note

Trochalopteron ngoclinhense (del Hoyo and Collar 2016) was previously listed as Garrulax ngoclinhensis.

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
Eames, J. C.; Le Trong Trai; Nguyen Cu. 1999. A new species of Laughingthrush (Passeriformes: Garrulacinae) from the Western Highlands of Vietnam. Bulletin of the British Ornithologists' Club 119: 4-15.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v) B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v); D2

Red List history
Year Category Criteria
2018 Endangered B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v)
2016 Vulnerable D2
2012 Vulnerable D2
2008 Vulnerable D2
2005 Vulnerable
2004 Vulnerable
2000 Vulnerable
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Land-mass type - continent
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 590 medium
Extent of Occurrence breeding/resident (km2) 65
Number of locations 2 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 1000-2499 poor suspected 2000
Population trend Decreasing poor inferred -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Largest subpopulations - - -
Generation length (yrs) 4.7 - - -

Population justification: Uncommon within a very small range, so placed in the band 1,000-2,499 mature individuals. This equates to 1,500-3,749 individuals in total, rounded here to 1,500-4,000 individuals. The estimate is provisional and requires confirmation.

Trend justification: Although the status of this species is very poorly known, it is thought that a slow decline may be occurring, owing to habitat degradation and trapping within its likely range (S. Mahood in litt. 2018).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Vietnam N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Vietnam Kon Plong
Vietnam Ngoc Linh

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Altitude 1480 - 2200 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Shifting agriculture Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals - Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Species mortality
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation

Recommended citation
BirdLife International (2019) Species factsheet: Trochalopteron ngoclinhense. Downloaded from http://www.birdlife.org on 18/01/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 18/01/2019.