Aberrant Bush-warbler (Horornis flavolivaceus) | Details

Aberrant Bush-warbler Horornis flavolivaceus

Current view: Data table and detailed info

Taxonomy

Taxonomic note

Cettia flavolivacea and C. vulcania (Sibley and Monroe [1990, 1993]) have been lumped into Horornis flavolivaceus 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.

IUCN Red List criteria met and history

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

Species attributes

Migratory status	altitudinal migrant	Forest dependency	low
Land-mass type		Average mass	8 g

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	14,000,000 km²
Extent of Occurrence (non-breeding)	14,000,000 km²
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	stable	-	suspected	-
Generation length	2.53 years	-	-	-

Population justification: The global population size has not been quantified, but the species is reported to be locally common (Baker 1997). 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 distribution

Country/Territory	Presence	Origin	Resident	Non-breeding visitor
Bhutan	extant	native	yes
China (mainland)	extant	native	yes
India	extant	native	yes
Indonesia	extant	native	yes
Laos	extant	native	yes
Malaysia	extant	native	yes
Myanmar	extant	native	yes
Nepal	extant	native	yes
Philippines	extant	native	yes
Thailand	extant	native		yes
Timor-Leste	extant	native	yes
Vietnam	extant	native	yes

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name
Nepal	Annapurna Conservation Area
Nepal	Dhorpatan Hunting Reserve
Nepal	Kanchenjungha Conservation Area
Nepal	Khaptad National Park
Nepal	Langtang National Park
Nepal	Mai Valley forests
Nepal	Makalu Barun National Park
Thailand	Doi Chiang Dao
Thailand	Doi Inthanon
Thailand	Doi Suthep-Pui
Thailand	Mae Fang

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Grassland	Temperate	suitable	resident
Shrubland	Temperate	suitable	resident
Altitude	0 - 4900 m	Occasional altitudinal limits

Recommended citation
BirdLife International (2024) Species factsheet: Aberrant Bush-warbler Horornis flavolivaceus. Downloaded from https://datazone.birdlife.org/species/factsheet/aberrant-bush-warbler-horornis-flavolivaceus on 29/12/2024.
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 29/12/2024.