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Taxonomic note

Previously placed in Sylvia (del Hoyo and Collar 2016) but moved to current genus following Cai et al. (2019). Species name previously spelt erroneously as subcaerulea. Formerly placed in genus Parisoma within family Timaliidae, but morphology, behaviour, vocalizations and mtDNA indicate better included in present genus. Geographical differences in plumage coloration seem mainly clinal, and intermediates frequent; validity of some subspecies merits further study. Proposed subspecies ombuensis (from WC Namibia) synonymized with cinerascens, which intergrades rather widely with nominate and with ansorgei. Four subspecies recognized.

Taxonomic source(s)
Handbook of the Birds of the World and BirdLife International. 2021. Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 6. Available at: https://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v6_Dec21.zip.

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

Migratory status	not a migrant	Forest dependency	does not normally occur in forest
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	3,840,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	stable	-	suspected	-
Generation length	4.09 years	-	-	-

Population justification: The global population size has not been quantified, but the species is described as relatively common and widespread in favourable habitat throughout its range (del Hoyo et al. 2006). 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
Angola	extant	native	yes
Botswana	extant	native	yes
Eswatini	extant	native	yes
Lesotho	extant	native	yes
Namibia	extant	native	yes
South Africa	extant	native	yes
Zambia	extant	vagrant			yes
Zimbabwe	extant	native	yes

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Savanna	Dry	major	resident
Shrubland	Subtropical/Tropical Dry	major	resident
Altitude		Occasional altitudinal limits

Purpose	Scale
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Chestnut-vented Warbler Curruca subcoerulea. Downloaded from https://datazone.birdlife.org/species/factsheet/chestnut-vented-warbler-curruca-subcoerulea 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.