Long-tailed Grasshopper-warbler (Locustella caudata)

Long-tailed Grasshopper-warbler Locustella caudata

Current view: Data table and detailed info

Taxonomy

Taxonomic note

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

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	Least Concern
2009	Least Concern
2008	Least Concern
2004	Least Concern
2000	Lower Risk/Least Concern
1994	Lower Risk/Near Threatened
1988	Near Threatened

Species attributes

Migratory status	not a migrant	Forest dependency	high
Land-mass type		Average mass	23 g

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	261,000 km²
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	-
Generation length	2.59 years	-	-	-

Population justification: The global population size has not been quantified, but the species is reported to be a familiar bird between 2,000 m and 3,600 m (MacKinnon and Phillipps 1995). This species is considered to have a high dependency on forest habitat, and tree cover is estimated to have declined by 2.5% within its mapped range over the past 10 years (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). It is therefore tentatively suspected that this rate of cover loss may have led to a decline of between 1-19% in the species' population size over the same time frame, with a best estimate of reduction being less than 5%.

Trend justification: .

Country/territory distribution

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Philippines	extant	native		yes

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name
Philippines	Mount Agtuuganon and Mount Pasian
Philippines	Mount Apo
Philippines	Mount Busa-Kiamba
Philippines	Mount Kitanglad
Philippines	Mount Malindang
Philippines	Mount Pulag National Park
Philippines	Mount Sinaka
Philippines	Peñablanca Protected Landscape and Seascape

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	suitable	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	700 - 2750 m	Occasional altitudinal limits

Recommended citation
BirdLife International (2024) Species factsheet: Long-tailed Grasshopper-warbler Locustella caudata. Downloaded from https://datazone.birdlife.org/species/factsheet/long-tailed-grasshopper-warbler-locustella-caudata on 26/11/2024.
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 26/11/2024.