• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2021	Near Threatened	A2c+3c+4c
2016	Near Threatened	A2c+3c+4c
2013	Near Threatened	A2c+3c+4c
2012	Near Threatened	A2c+3c+4c
2008	Near Threatened	A2c; A3c; A4c
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Least Concern
1988	Lower Risk/Least Concern

Migratory status	not a migrant	Forest dependency	Medium
Land mass type	Land-mass type - continent Land-mass type - shelf island	Average mass	-

	Estimate	Data quality
Extent of Occurrence breeding/resident (km2)	2,920,000	medium
Number of locations		-
Severely Fragmented		-

	Value	Data quality	Derivation	Year of estimate
No. of mature individuals	unknown	not applicable	not applicable	0
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)	15-25	-	-	-
Decline (10 years/3 generation past and future)	15-25	-	-	-
Number of subpopulations		-	-	-
Percentage in largest subpopulation		-	-	-
Generation length (yrs)	4.4	-	-	-

Population justification: The global population size has not been quantified, but the species is described as generally uncommon to fairly common, although common in Borneo and extinct in Singapore (del Hoyo et al. 2007, Wells 2007, Eaton et al. 2021).

Trend justification: Despite the ability of this species to persist in degraded forest habitats, it is intolerant of oil palm plantations and there are indications that populations in fragmented secondary forest may be unable to persist long term. Remote-sensing data indicate rates of forest loss approximating 15% over three generations. Because of additional, unquantified fragmentation impacts, it is here tentatively suspected to be undergoing a decline of 15-25% in three generations (13.2 years).

Country/Territory	Occurrence status	Presence	Resident	Breeding	Non-breeding	Passage
Brunei	N	Extant	Yes
Indonesia	N	Extant	Yes
Malaysia	N	Extant	Yes
Singapore	N	Extinct	Yes
Thailand	N	Extant	Yes

Country/Territory	IBA Name
Malaysia	Ulu Muda
Malaysia	Bintang Range
Malaysia	Pondok Tanjung Forest Reserve
Malaysia	Selangor Heritage Park
Malaysia	Endau-Rompin
Malaysia	Krau Wildlife Reserve
Malaysia	Taman Negara National Park
Malaysia	South-east Pahang peat swamp forest
Malaysia	Kinabatangan floodplain
Malaysia	Maliau Basin Conservation Area
Malaysia	Tabin Wildlife Reserve
Malaysia	Kabili-Sepilok
Malaysia	Tanjung Datu-Samunsam Protected Area
Malaysia	Gunung Pueh
Malaysia	Sadong-Saribas coast
Malaysia	Lanjak Entimau Wildlife Sanctuary
Malaysia	Danum-Linau
Malaysia	Similajau National Park
Malaysia	Niah National Park
Malaysia	Lambir Hills National Park
Malaysia	Mulu - Buda Protected Area
Thailand	Bala Sector, Hala-Bala Wildlife Sanctuary
Thailand	Hala Sector, Hala-Bala Wildlife Sanctuary and Bang Lang National Park
Thailand	Khao Nor Chuchi

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Subtropical/Tropical Heavily Degraded Former Forest	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Swamp	suitable	resident
Altitude	0 - 1400 m	Occasional altitudinal limits

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%)		Negligible declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Ecosystem degradation
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Ecosystem degradation
Natural system modifications	Fire & fire suppression - Increase in fire frequency/intensity	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation

Purpose	Primary form used	Life stage used	Source	Scale	Level	Timing
Pets/display animals, horticulture	-	-		International	Non-trivial	Recent

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Recommended citation
BirdLife International (2022) Species factsheet: Stachyris nigricollis. Downloaded from http://www.birdlife.org on 16/01/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 16/01/2022.