• 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
2024	Least Concern
2016	Least Concern
2012	Least Concern
2009	Least Concern
2008	Least Concern
2004	Least Concern
2000	Lower Risk/Least Concern
1994	Lower Risk/Least Concern
1988	Lower Risk/Least Concern

Migratory status	altitudinal migrant	Forest dependency	high
Land-mass type		Average mass	97 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	2,410,000 km2
Extent of Occurrence (non-breeding)	2,990,000 km2
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	-
Generation length	3.88 years	-	-	-

Population justification: The global population size has not been quantified, but the species is described as locally common throughout much of its breeding range, rare in China and an uncommon resident in northern Laos and northern Vietnam (del Hoyo et al. 2005). This species is considered to have a high dependency on forest habitat, and tree cover is estimated to have declined by 10.2% within its mapped range over the past 10 years (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). It is therefore tentatively suspected that this rate of cover loss may have led to a decline of between 1-19% in the species' population size over the same time frame, with a best estimate of reduction being 11-14%.

Trend justification:   .

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Bangladesh	extant	vagrant
Bhutan	extant	native
China (mainland)	extant	native
India	extant	native
Laos	extant	native
Myanmar	extant	native
Nepal	extant	native
Pakistan	extant	native
Thailand	extant	native
Vietnam	extant	native

Country/Territory	IBA Name
Nepal	Annapurna Conservation Area
Nepal	Barandabhar forests and wetlands
Nepal	Bardia National Park
Nepal	Dang Deukhuri foothill forests and west Rapti wetlands
Nepal	Khaptad National Park
Nepal	Langtang National Park
Nepal	Mai Valley forests
Nepal	Makalu Barun National Park
Nepal	Phulchoki Mountain forests
Nepal	Shivapuri-Nagarjun National Park
Nepal	Tamur valley and watershed
Vietnam	Ban Bung
Vietnam	Fan Si Pan

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Mangrove Vegetation Above High Tide Level	suitable	non-breeding
Forest	Subtropical/Tropical Moist Montane	major	breeding
Shrubland	Subtropical/Tropical Dry	suitable	non-breeding
Shrubland	Subtropical/Tropical Moist	suitable	non-breeding
Altitude	170 - 3740 m	Occasional altitudinal limits

Purpose	Scale
Pets/display animals, horticulture	international

---

Recommended citation
BirdLife International (2024) Species factsheet: Grey-winged Blackbird Turdus boulboul. Downloaded from https://datazone.birdlife.org/species/factsheet/grey-winged-blackbird-turdus-boulboul on 23/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 23/11/2024.