• 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.
Wells, D. R.; Dickinson, E. C.; Dekker, R. W. R. J. 2003. A preliminary review of the Chloropseidae and Irenidae. Zoologische Verhandelingen 344: 25-42.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	A2d+3d+4d	A2d+3d+4d

Red List history

Year	Category	Criteria
2019	Endangered	A2d+3d+4d
2016	Vulnerable	A2bd+3d+4d
2012	Least Concern
2009	Least Concern
2008	Least Concern
2006	Least Concern
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	130,000 km2
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	inferred	2012-2024
Rate of change over the past 10 years/3 generations (longer of the two periods)	50-79%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	50-79%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	50-79%	-	-	-
Generation length	4.2 years	-	-	-

Population justification: The population size is unknown, and due to the severe trapping pressure exerted on the species it is not possibly to extrapolate suitable density figures across an estimated area of suitable habitat. Previously Sumatran Leafbird was considered likely to be common within range on Sumatra but poorly known (del Hoyo et al. 2005). However, while rates of bird trapping were high, a surge in popularity in leafbirds, especially Greater Green C. sonnerati, occurred from 2012 onwards resulting in exceptionally high numbers being trapped and traded (Chng et al. 2017) with increases in all leafbird species traded. Sumatra has been heavily targeted by trappers since the ban on international imports following the Avian Influenza outbreak in 2001. Observations of Sumatran Leafbird are now very few, widely scattered across the former range (J. Eaton in litt. 2016), and the population is certainly much reduced.

Trend justification: The population is suspected to be suffering a very rapid declining in population due to trapping for the cage bird trade, coupled with ongoing habitat destruction. A process of expert review classified the species as 'Severely Declining' (Harris et al. 2015), and a modelling approach to estimating potential rates of decline based on accessibility of the range and desirability of the species calculated that the species could be suspected to decline by 72% due to hunting within the next three-generation period (Symes et al. 2018).

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

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Plantations	suitable	resident
Artificial/Terrestrial	Rural Gardens	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	suitable	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	600 - 1000 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Scale Unknown/Unrecorded	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Very Rapid Declines		High Impact: 8
		Stresses Species disturbance, Species mortality

Purpose	Scale
Pets/display animals, horticulture	national, international

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Recommended citation
BirdLife International (2024) Species factsheet: Sumatran Leafbird Chloropsis media. Downloaded from https://datazone.birdlife.org/species/factsheet/sumatran-leafbird-chloropsis-media on 27/12/2024.
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 27/12/2024.