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

Justification of Red List category
Although tolerant of habitat degradation, this single island endemic is thought to have a moderately small population and range which is probably declining, given the ongoing deforestation taking place throughout its range. It is therefore classified as Near Threatened.

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.

Treron teysmannii is restricted to Sumba, Indonesia.

It occurs at all altitudes in open forest, particularly disturbed areas with tall trees (although this might reflect a greater ease of detection in such habitats). It is recorded to 800 m (Eaton et al. 2021).

Continued deforestation is thought to be the principal threat to this species. The extent and effects, if any, of hunting are not known, but are not thought to be substantial.

Conservation Actions Underway
No specific action is known, although it occurs in Laiwangi Wanggameti and Manupeu Tanah Daru National Parks.

Conservation Actions Proposed
Regularly monitor at certain sites throughout its range to determine population trends. Investigate the extent of hunting by local residents. If relevant, control hunting where possible, perhaps using awareness campaigns. Protect significant areas of suitable forest throughout its range.

Text account compilers
Berryman, A.

Contributors
Benstead, P., Eaton, J., Hutchinson, R., Mahood, S., Martin, R., Taylor, J., Westrip, J.R.S. & Yong, D.

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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 23/12/2024.
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 23/12/2024.