• 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.
Dowsett, R. J.; Forbes-Watson, A. D. 1993. Checklist of birds of the Afrotropical and Malagasy regions. Tauraco Press, Li
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
-	-	-

Red List history

Year	Category	Criteria
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	not a migrant	Forest dependency	low
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	4,300 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	poor	estimated	2009
Population trend	stable	-	suspected	-
Generation length	4.3 years	-	-	-

Population justification: The total population has been estimated to be in excess of 5,000 individuals (del Hoyo et al. 2006). Estimates of population densities were 27.5 and 3.9 individuals per km² in the coastal plain and foothills respectively (with no data from the highlands) (Davidson 1996).

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
Yemen	extant	native	yes

Country/Territory	IBA Name
Yemen	Limestone plateau above Siko village (Socotra)
Yemen	Wadi Di Negehen (Socotra)
Yemen	Jabal Ma'alah / Ma'alah Plateau (Socotra)
Yemen	Noged Plain (Socotra)
Yemen	Wadi Ayhaft (Socotra)
Yemen	Falang - Momi coast and cliffs (Socotra)
Yemen	Haggeher (Socotra)
Yemen	Hamaderoh plateau and scarp (Socotra)
Yemen	Firmihin near Jabal Keseslah (Socotra)
Yemen	Diksam (Socotra)
Yemen	North slopes of the Haggeher Mountains (Socotra)
Yemen	Wadi Merkoh (Socotra)

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Dry	suitable	resident
Grassland	Subtropical/Tropical Dry	major	resident
Shrubland	Subtropical/Tropical Dry	major	resident
Shrubland	Subtropical/Tropical High Altitude	major	resident
Altitude	0 - 1400 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		Whole (>90%)		Unknown		Unknown
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Livestock farming & ranching - Small-holder grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Whole (>90%)		Unknown		Unknown
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Whole (>90%)		Unknown		Unknown
		Stresses Ecosystem degradation

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Recommended citation
BirdLife International (2023) Species factsheet: Incana incana. Downloaded from http://datazone.birdlife.org/species/factsheet/socotra-warbler-incana-incana on 05/12/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://datazone.birdlife.org on 05/12/2023.