Western Crowned Leaf-warbler (Phylloscopus occipitalis)

Western Crowned Leaf-warbler Phylloscopus occipitalis

Current view: Data table and detailed info

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.

IUCN Red List criteria met and history

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

Species attributes

Migratory status	full migrant	Forest dependency	medium
Land-mass type		Average mass	9 g

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	486,000 km²
Extent of Occurrence (non-breeding)	790,000 km²
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	-
Generation length	2.42 years	-	-	-

Population justification: The global population size has not been quantified, but the species is described as common and widespread in its breeding range (del Hoyo et al. 2006). This species is considered to have a medium dependency on forest habitat, and tree cover is estimated to have declined by 0.5% within its mapped range over the past 10 years (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). Therefore, as a precautionary measure, it is tentatively suspected that this loss of cover may have led to a decline of between 1-19% in the species' population size over the same time frame.

Trend justification: .

Country/territory distribution

Country/Territory	Presence	Origin	Breeding visitor
Afghanistan	extant	native	yes
Bangladesh	extant	native
India	extant	native
Nepal	extant	native
Pakistan	extant	native
Tajikistan	extant	native	yes
Uzbekistan	extant	native	yes

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name
Afghanistan	Pech and Waygal valleys
Afghanistan	Safed Koh
Nepal	Dhorpatan Hunting Reserve
Nepal	Khaptad National Park

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	non-breeding
Forest	Temperate	major	breeding
Shrubland	Temperate	suitable	breeding
Altitude	0 - 4660 m	Occasional altitudinal limits	(min) 1800 m

Recommended citation
BirdLife International (2024) Species factsheet: Western Crowned Leaf-warbler Phylloscopus occipitalis. Downloaded from https://datazone.birdlife.org/species/factsheet/western-crowned-leaf-warbler-phylloscopus-occipitalis on 22/11/2024.
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 22/11/2024.