LC
Aberrant Bush-warbler Horornis flavolivaceus



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
2016 Least Concern
Species attributes

Migratory status altitudinal migrant Forest dependency Low
Land mass type Average mass 8 g
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 14,000,000
Extent of Occurrence non-breeding (km2) 14,000,000
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals unknown not applicable not applicable 0
Population trend Stable 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) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Largest subpopulations - - -
Generation length (yrs) 3.7 - - -

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

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 Occurrence status Presence Resident Breeding Non-breeding Passage
Bhutan N Extant Yes
China (mainland) N Extant Yes
India N Extant Yes
Indonesia N Extant Yes
Laos N Extant Yes
Malaysia N Extant Yes
Myanmar N Extant Yes
Nepal N Extant Yes
Philippines N Extant Yes
Thailand N Extant Yes
Timor-Leste N Extant Yes
Vietnam N Extant 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

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   Occasional altitudinal limits  

Recommended citation
BirdLife International (2020) Species factsheet: Horornis flavolivaceus. Downloaded from http://www.birdlife.org on 18/09/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 18/09/2020.