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

Taxonomic note

Phylloscopus poliocephalus and P. makirensis (Sibley & Monroe [1990, 1993]) have been lumped and subsequently split into P. poliocephalus, P. misoriensis and P. maforensis following del Hoyo and Collar (2016).

 

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
2022	Near Threatened	B1b(ii,iii); C2a(ii)
2016	Vulnerable	C2a(ii)

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

	Estimate	Data quality
Extent of Occurrence breeding/resident (km2)	3,600
Extent of Occurrence breeding/resident (km2)	3,000
Number of locations		-
Severely Fragmented		-

	Value	Data quality	Derivation	Year of estimate
No. of mature individuals	2500-9999	poor	suspected	2021
Population trend	Decreasing		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)	5-10	-	-	-
Decline (10 years/3 generation past and future)	5-10	-	-	-
Number of subpopulations	1	-	-	-
Percentage in largest subpopulation	100	-	-	-

Population justification: The species has been described as uncommon and possibly an order of magnitude lower than congeners (G. Dutson in litt. 2016); for example, two three-day visits to the island's forests in 2019 recorded the species only once (J. Bergmark in litt. 2021), and eBird (2021) data indicate that it is among the hardest of the island's endemics to see. Therefore, based on descriptions of abundance, population density estimates of congeners, and assuming only a proportion of habitat is occupied, the population size may fall below 10,000 mature individuals, and so is provisionally suspected to number 2,500-9,999 mature individuals until more robust, species-specific data are available. Given descriptions of this species' rarity, generating a robust population estimate should be considered a research priority.

Trend justification: Global Forest Watch (2021), using data from Hansen et al. (2013) and methods disclosed therein, indicate that between 2010 and 2020 this species lost 6-8% of forest cover (>30% canopy cover) in its range. As a forest dependent species, it is suspected to have declined at a similar rate. Forest loss in 2016-2020 occurred at the same rate, such that these declines are expected to continue in the future.

Country/Territory	Occurrence status	Presence	Resident	Breeding	Non-breeding	Passage
Indonesia	N	Extant	Yes

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	suitable	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	0 - 740 m	Occasional altitudinal limits

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

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Recommended citation
BirdLife International (2023) Species factsheet: Phylloscopus misoriensis. Downloaded from http://www.birdlife.org on 24/03/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 24/03/2023.