• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2018	Near Threatened	C1
2016	Near Threatened	A2c+3c+4c
2012	Near Threatened	A2c+3c+4c
2008	Near Threatened	A2c; A3c; A4c
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Near Threatened
1988	Near Threatened

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	1,910,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	poor	inferred	1998-2008
Rate of change over the past 10 years/3 generations (longer of the two periods)	25-29%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	25-29%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	25-29%	-	-	-
Generation length	4.8 years	-	-	-

Population justification: There is no clear data to accurately estimate the global population of this species, but given the very low reporting rates it is plausible that the population size could be <10,000 mature individuals. However, mist netting has found the species to be more common than previously thought in some areas (Yong et al. 2014), and reported population densities are c.21-22 individuals per km² (Dutson et al. 1991, Wilkinson et al. 1991). There have been few recent records from areas of suitable habitat (D. L. Yong in litt. 2007) and it has disappeared from several sites where it had been previously known (Yong et al. 2014). Additionally, the species is considered to react strongly to playback; yet, survey work in the early 2010s only found the species at two sites (D. Bakewell in litt. 2013). The sparse and scattered reporting of the species could mean that it may persist in only very small pockets throughout its range and without further information the population size is in effect unknown, although potentially very small.

Trend justification: Data from Tracewski et al. (2016) suggests that forest loss within the species’s range has been at a rate of 16.2% over three generations (14.4 years). It is suspected that the population size declines at a similar rate.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Brunei	extant	native	yes
Indonesia	extant	native	yes
Malaysia	extant	native	yes
Singapore	extinct	native	yes

Country/Territory	IBA Name
Malaysia	Bintang Range
Malaysia	Dulit Range
Malaysia	Endau-Rompin
Malaysia	Kinabatangan floodplain
Malaysia	Krau Wildlife Reserve
Malaysia	Lambir Hills National Park
Malaysia	Lanjak Entimau Wildlife Sanctuary
Malaysia	Mulu - Buda Protected Area
Malaysia	Niah National Park
Malaysia	Panti forest
Malaysia	Sadong-Saribas coast
Malaysia	Similajau National Park
Malaysia	Tabin Wildlife Reserve
Malaysia	Taman Negara National Park
Malaysia	Tanjung Datu-Samunsam Protected Area

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Dry	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Swamp	major	resident
Altitude	0 - 915 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Agro-industry farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation
Natural system modifications	Fire & fire suppression - Increase in fire frequency/intensity	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation

Purpose	Scale
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Grey-breasted Babbler Malacopteron albogulare. Downloaded from https://datazone.birdlife.org/species/factsheet/grey-breasted-babbler-malacopteron-albogulare 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.