Friendly Grasshopper-warbler Locustella accentor


Taxonomic note

Locustella accentor (del Hoyo and Collar 2016) was previously listed as Bradypterus accentor.

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
2021 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 Near Threatened
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Average mass -

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 822
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals unknown not applicable not applicable 0
Population trend Stable inferred -
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 - - -
Percentage in largest subpopulation - - -

Population justification: The global population size has not been quantified, but the species is described as fairly common within its preferred altitudinal range (del Hoyo et al. 2006). Density is considered low, with only four to five singing birds likely to be encountered in a full morning's walk within the narrow elevational range (Madge 2020). This suggests that the overall population size is unlikely to be large, and may be in the low thousands at most. There is no indication that the population is declining, and the habitat is not under threat, hence the population is presently considered stable. The current preferred elevation range of the species is at least 1,000 m below the peaks of the mountains on which it is found, although if it is impacted by climate change the extent of suitable habitat will decrease. No upslope shift has been noted for the species to date, though it is unclear that there is sufficient information available to detect such a movement.

Trend justification: Within the elevational range of the species habitat is currently secure. The only loss of forest cover has been through very few natural landslips (Global Forest Watch 2021). In the absence of direct threats, the population is considered stable.

Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Malaysia N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Malaysia Mount Kinabalu
Malaysia Trus Madi Range
Malaysia Mulu - Buda Protected Area
Malaysia Lanjak Entimau Wildlife Sanctuary

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Altitude 2135 - 2745 m Occasional altitudinal limits (max) 3660 m

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Unknown Unknown
Indirect ecosystem effects, Ecosystem degradation

Recommended citation
BirdLife International (2022) Species factsheet: Locustella accentor. Downloaded from on 28/11/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from on 28/11/2022.