Sulphur-bellied Bulbul (Iole palawanensis) - BirdLife species factsheet

Sulphur-bellied Bulbul Iole palawanensis

Current view: Data table and detailed info

Taxonomy

Taxonomic note
Iole palawanensis (del Hoyo and Collar 2016) was previously listed as Ixos palawanensis.

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.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.

IUCN Red List criteria met and history

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
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	27 g

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	23,300 km²
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	-
Generation length	3.5 years	-	-	-

Population justification: The global population size has not been quantified, but the species is described as uncommon (del Hoyo et al. 2005).

Trend justification: The population is suspected to be in decline owing to ongoing habitat destruction.

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	El Nido
Philippines	Mount Mantalingahan
Philippines	Puerto Princesa Subterranean River Natural Park / Cleopatra's Needle
Philippines	Victoria and Anepahan Ranges

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude		Occasional altitudinal limits

Recommended citation
BirdLife International (2024) Species factsheet: Sulphur-bellied Bulbul Iole palawanensis. Downloaded from https://datazone.birdlife.org/species/factsheet/sulphur-bellied-bulbul-iole-palawanensis 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.