Hairy-backed Bulbul (Tricholestes criniger) - BirdLife species factsheet

Hairy-backed Bulbul Tricholestes criniger

Current view: Data table and detailed info

Taxonomy

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/Least Concern
1988	Lower Risk/Least Concern

Species attributes

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

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	3,680,000 km²
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	-
Generation length	3.24 years	-	-	-

Population justification: The global population size has not been quantified, but the species is described as generally common (del Hoyo et al. 2005). This species is considered to have a high dependency on forest habitat, and tree cover is estimated to have declined by 19.4% 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 15-19%.

Trend justification: .

Country/territory distribution

Country/Territory	Presence	Origin	Resident
Brunei	extant	native	yes
Indonesia	extant	native	yes
Malaysia	extant	native	yes
Myanmar	extant	native	yes
Thailand	extant	native	yes

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name
Malaysia	Bau Limestone
Malaysia	Belum-Temenggor
Malaysia	Bintang Range
Malaysia	Central Titiwangsa Range
Malaysia	Danum Valley Conservation Area
Malaysia	Danum-Linau
Malaysia	Endau-Rompin
Malaysia	Gunung Pueh
Malaysia	Kabili-Sepilok
Malaysia	Kinabatangan floodplain
Malaysia	Kledang Range
Malaysia	Krau Wildlife Reserve
Malaysia	Kulamba Wildlife Reserve
Malaysia	Lambir Hills National Park
Malaysia	Lanjak Entimau Wildlife Sanctuary
Malaysia	Maliau Basin Conservation Area
Malaysia	Mount Kinabalu
Malaysia	Mulu - Buda Protected Area
Malaysia	Nakawan Range
Malaysia	Niah National Park
Malaysia	Panti forest
Malaysia	Pondok Tanjung Forest Reserve
Malaysia	Selangor Heritage Park
Malaysia	Similajau National Park
Malaysia	South-east Pahang peat swamp forest
Malaysia	Tabin Wildlife Reserve
Malaysia	Taman Negara National Park
Malaysia	Tanjung Datu-Samunsam Protected Area
Malaysia	Ulu Muda
Thailand	Bala Sector, Hala-Bala Wildlife Sanctuary
Thailand	Hala Sector, Hala-Bala Wildlife Sanctuary and Bang Lang National Park
Thailand	Kaeng Krachan
Thailand	Khao Banthad
Thailand	Khao Luang
Thailand	Khao Nor Chuchi
Thailand	Thaleban

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Swamp	suitable	resident
Altitude	0 - 1560 m	Occasional altitudinal limits

Recommended citation
BirdLife International (2024) Species factsheet: Hairy-backed Bulbul Tricholestes criniger. Downloaded from https://datazone.birdlife.org/species/factsheet/hairy-backed-bulbul-tricholestes-criniger 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.