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

Taxonomic note

Phylloscopus borealis , P. examinandus and P. xanthodryas (del Hoyo and Collar 2016) were previously lumped as P. borealis following AERC TAC (2003), AOU (1998 & supplements), Christidis & Boles (2008), Cramp et al. (1977-1994), Sibley & Monroe (1990, 1993) and Stotz et al. (1996).

 

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	Not Recognised
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Migratory status	full migrant	Forest dependency	low
Land-mass type		Average mass	11 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	3,260,000 km2	medium
Extent of Occurrence (non-breeding)	8,280,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	poor	-	-
Population trend	stable	-	suspected	-
Generation length	2.02 years	-	-	-

Population justification: The population has not been quantified since the species was split. The population is suspected to be stable in the absence of evidence for any declines or substantial threats.

Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Brunei	extant	native			yes
Hong Kong (China)	extant	native				yes
Indonesia	extant	native			yes
Japan	extant	native		yes
Laos	extant	native				yes
Malaysia	extant	native			yes
North Korea	extant	native				yes
Philippines	extant	native			yes
Russia	extant	native		yes
Russia (Asian)	extant	native		yes
South Korea	extant	native				yes
Taiwan, China	extant	native			yes
USA	extant	vagrant

Country/Territory	IBA Name
Japan	Shiretoko, Mount Syari-dake

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Arable Land	suitable	non-breeding
Artificial/Terrestrial	Plantations	suitable	non-breeding
Artificial/Terrestrial	Rural Gardens	suitable	non-breeding
Artificial/Terrestrial	Subtropical/Tropical Heavily Degraded Former Forest	suitable	non-breeding
Forest	Boreal	suitable	breeding
Forest	Subtropical/Tropical Dry	suitable	non-breeding
Forest	Subtropical/Tropical Mangrove Vegetation Above High Tide Level	suitable	non-breeding
Forest	Subtropical/Tropical Moist Lowland	suitable	non-breeding
Shrubland	Boreal	major	breeding
Wetlands (inland)	Permanent Rivers/Streams/Creeks (includes waterfalls)	suitable	non-breeding
Altitude	1800 - 2500 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Climate change & severe weather	Habitat shifting & alteration	Timing		Scope		Severity		Impact
		Future		Whole (>90%)		Unknown		Unknown
		Stresses Indirect ecosystem effects, Ecosystem degradation

Purpose	Scale
Pets/display animals, horticulture	subsistence, national

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Recommended citation
BirdLife International (2024) Species factsheet: Kamchatka Leaf-warbler Phylloscopus examinandus. Downloaded from https://datazone.birdlife.org/species/factsheet/kamchatka-leaf-warbler-phylloscopus-examinandus on 22/12/2024.
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 22/12/2024.