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

Taxonomic note

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.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	A2c+3c+4c; C2a(i)

Red List history

Year	Category	Criteria
2016	Vulnerable	A2c+3c+4c;C2a(i)
2012	Vulnerable	A2c+3c+4c;C2a(i)
2008	Vulnerable	A2c; A3c; A4c; C2a(i)
2004	Vulnerable
2000	Vulnerable
1996	Vulnerable
1994	Vulnerable
1988	Lower Risk/Least Concern

Migratory status	not a migrant	Forest dependency	medium
Land mass type	land-mass type - shelf island	Average mass	-

	Estimate	Data quality
Extent of Occurrence breeding/resident (km2)	264,000	medium
Number of locations	11-100	-
Severely Fragmented		-

	Value	Data quality	Derivation	Year of estimate
No. of mature individuals	2500-9999	poor	estimated	1999
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)	30-49	-	-	-
Decline (10 years/3 generation past and future)	30-49	-	-	-
Number of subpopulations	2-100	-	-	-
Percentage in largest subpopulation		-	-	-
Generation length (yrs)	3.9	-	-	-

Population justification: The population size is preliminarily estimated to fall into the band 2,500-9,999 mature individuals. This equates to 3,750-14,999 individuals in total, rounded here to 3,500-15,000 individuals.

Trend justification: A rapid and on-going population decline is suspected, owing to rapid and continuing deforestation and habitat degradation across the species's range.

Country/Territory	Presence	Origin	Resident	Breeding	Non-breeding	Passage
Philippines	extant	native	yes

Country/Territory	IBA Name
Philippines	Anonang-Lobi Range
Philippines	Basilan Natural Biotic Area
Philippines	Bislig
Philippines	Mount Agtuuganon and Mount Pasian
Philippines	Mount Busa-Kiamba
Philippines	Mount Cabalantian - Mount Capoto-an complex
Philippines	Mount Dapiak-Mount Paraya
Philippines	Mount Hilong-hilong
Philippines	Mount Kambinlio and Mount Redondo
Philippines	Mount Kampalili-Puting Bato
Philippines	Mount Malindang
Philippines	Mount Sugarloaf
Philippines	Mount Yacgun - Mount Sohoton complex
Philippines	Pasonanca watershed
Philippines	Southern Samar mountains

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	0 - 900 m	Occasional altitudinal limits	(max) 1200 m

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Wood & pulp plantations - Scale Unknown/Unrecorded	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Rapid Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation
Energy production & mining	Mining & quarrying	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Rapid Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Residential & commercial development	Commercial & industrial areas	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Rapid Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Residential & commercial development	Tourism & recreation areas	Timing		Scope		Severity		Impact
		Future		Minority (<50%)		Rapid Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2023) Species factsheet: Ficedula basilanica. Downloaded from http://datazone.birdlife.org/species/factsheet/little-slaty-flycatcher-ficedula-basilanica on 07/06/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://datazone.birdlife.org on 07/06/2023.