• 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. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2022	Near Threatened	B1b(iii); C2a(ii)
2016	Near Threatened	C2a(ii)
2012	Near Threatened	C2a(ii)
2008	Near Threatened	C2a(ii)
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Near Threatened
1988	Threatened

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	9,500 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	10000-15000 mature individuals	medium	estimated	2021
Population trend	decreasing	poor	suspected	2016-2029
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Generation length	4.5 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: The species was recorded to occur at densities of 8.1 individuals/km² (Jones et al. 1995). According to Global Forest Watch (2022, based on data and methods from Hansen et al. [2013]), there was c.2,200 km² of forest (excluding plantations) in its range in 2021. The species is unable to occupy all habitat (some of which may occur in patches too small), but it is able to tolerate second growth and plantations (Eaton et al. 2021, eBird 2022) in some areas. Consequently, the population is estimated to number 10,000-15,000 mature individuals.

Trend justification: The population is suspected to be declining due to habitat loss and, to a much lesser extent, impacts of localised hunting. In the three generations (13.5 years; Bird et al. 2020) to 2021, forest cover loss in this species' range was reduced by c.5% (Global Forest Watch 2022, based on data from Hansen et al. [2013] and methods disclosed therein). As a forest-dependent species, the population size reduction is thought to be approximately equivalent, although it may cope with some degradation. Impacts of hunting are thought to be highly localised and not driving substantial population declines. Overall therefore, the species is suspected of declining at an ongoing rate of 1-9% over three generations.

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

Country/Territory	IBA Name
Indonesia	Laiwanggi Wanggameti
Indonesia	Luku Melolo
Indonesia	Manupeu Tanadaru
Indonesia	Poronumbu
Indonesia	Tanjung Ngunju
Indonesia	Yawila

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	0 - 800 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion

Purpose	Scale
Food - human	subsistence

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Recommended citation
BirdLife International (2024) Species factsheet: Sumba Green-pigeon Treron teysmannii. Downloaded from https://datazone.birdlife.org/species/factsheet/sumba-green-pigeon-treron-teysmannii 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.