Sumba Green-pigeon Treron teysmannii


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

Population justification
The global population size has been estimated as 14,000 individuals (Jones et al. 1995).

Trend justification
There are no data on population trends; however, the species is suspected to be declining at a slow to moderate rate, owing to forest degradation.

Distribution and population

Treron teysmannii is restricted to Sumba, Indonesia, where the population in the early 1990s was estimated to be somewhat larger than 14,000 birds and presumably declining with forest clearance (BirdLife International 2001).


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).


Continued deforestation is presumably causing this species to decline, and forest fires may present an important problem especially as they are thought to increase in frequency with climate change (D. L. Yong in litt. 2016). The extent and effects, if any, of hunting are not known.

Conservation actions

Conservation Actions Underway
None is known.

Conservation Actions Proposed
Survey to assess population size.  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 and investigate means to mitigate forest fires and their impacts.


Text account compilers
Taylor, J., Mahood, S., Benstead, P., Martin, R, Westrip, J.

Yong, D., Eaton, J., Hutchinson, R.

Recommended citation
BirdLife International (2022) Species factsheet: Treron teysmannii. Downloaded from http://www.birdlife.org on 02/10/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 02/10/2022.