VU
Nonggang Babbler Stachyris nonggangensis



Taxonomy

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.
Zhou Fang; Jiang Aiwu. 2008. A new species of Babbler (Timaliidae: Stachyris) from the Sino-Vietnamese border region of China. The Auk 125(2): 420-424.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - C2a(ii)

Red List history
Year Category Criteria
2016 Vulnerable C2a(ii)
2012 Vulnerable C2a(ii)
2010 Near Threatened B1a+b(iii)
2008 Not Recognised
2004 Not Recognised
2000 Not Recognised
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) 1,300 medium
Number of locations 11-100 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 2500-9999 medium estimated 2012
Population trend Decreasing poor suspected -
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 1 - - -
Largest subpopulations 100 - - -
Generation length (yrs) 3.7 - - -

Population justification: Surveys conducted since 2008 have resulted in an estimate of 1,000-2,000 mature individuals, all in one subpopulation (Zhou Fang et al. in litt. 2010). Surveys have focussed on reserves, with the species recorded in Nonggang, Bangliang, Chunxiu, Qinglongshan, and Xialei (Li et al. 2013, Yu et al. 2014, Zhou Fang in litt. 2016). Li et al. (2013) suggest the number of individuals may be >2,000 in Nonggang, Bangliang, Chunxiu and Trung Khanh (Vietnam [which was not surveyed as part of this study]), although they do also suggest the global population may be as low as 1,500 individuals. However, there does still remain suitable habitat to survey - particularly in Vietnam - and while reserves may provide the most appropriate habitat, the species may also occur outside of these. Additionally the lack of sightings of this species at certain reserves does not mean it does not occur there, as Li et al. (2013) did not find the species at Qinglongshan, when Yu et al. (2014) did. Therefore, the population size is tentatively retained within the range of 2,500-9,999 mature individuals; although this may be revised downwards with further information, particularly from Vietnam.

Trend justification: Population trends have not been quantified; however, given that its habitat is selectively logged, the species is suspected to be in decline owing to on-going habitat degradation.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
China (mainland) N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Rocky areas (eg. inland cliffs, mountain peaks) suitable resident
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Agro-industry farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation
Transportation & service corridors Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2019) Species factsheet: Stachyris nonggangensis. Downloaded from http://www.birdlife.org on 21/03/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 21/03/2019.