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

Justification of Red List category
This species occupies a small range, within which forest habitat continues to be cleared. It is not considered more threatened because it appears to be tolerant of secondary growth and favours montane forest which is less under threat. Accordingly, it is listed as Near Threatened.

Population justification
In this species' range, there was c.3,000 km² of forest (with >50% canopy cover) in 2021 (per Global Forest Watch 2022, based on data from Hansen et al. [2013] and methods disclosed therein). Poulsen (1998) recorded densities of Eumyias additus of 20.4-32.7 birds/km² in primary and modified lowland habitat, with a much higher density of 92.6 birds/km² in montane forest. This altitudinal difference is reaffirmed by Poulsen and Lambert (2000) who noted a significantly higher encounter rate in montane forest. The majority of individuals documented by Poulsen (1998) were aurally detected, thus are likely to refer to mature individuals. Accounting for a range of density scenarios, and occupancy of 30-50%, the population is estimated to number 36,000-100,000 mature individuals, with a best (and precautionary) estimate of 36,000-50,000.

Trend justification
In the ten years to 2021, forest cover in this species' range reduced by c.4-5% (Global Forest Watch 2022, based on data from Hansen et al. [2013] and methods disclosed therein), and this is thought to have had broadly equivalent impacts on the species' population size. Although selective logging and degradation is not accounted for in these data, E. additus is capable of persisting in logged and modified forest (see Poulsen 1998). Thus the species is suspected of having declined by 1-9% (with a best estimate of 5%) over the past ten years, and the same rate is precautionarily suspected to continue into the future.

Eumyias additus is restricted to Buru, Indonesia, where it is a relatively widespread and common upland species (Eaton et al. 2021, eBird 2022).

It inhabits lowland and montane forest at 500-1,500 m.

The principal threat to this species is the loss and degradation of forest habitat for agricultural expansion, which is occurring at a slow rate across its single-island home. In the ten years to 2021, forest cover in this species' range reduced by c.4-5% (Global Forest Watch 2022, based on data from Hansen et al. [2013] and methods disclosed therein), and this is thought to have had broadly equivalent impacts on the species population size. Although selective logging and degradation is not accounted for in these data, E. additus is capable of persisting in logged and modified forest (see Poulsen 1998).

Conservation Actions Underway
None is known. The species presumably occurs in Masbait Wildlife Reserve, but this protects only a tiny (62.5 km²) portion of Buru.

Conservation Actions Proposed
Propose and effectively protect areas of forest on Buru for this and other endemic species. Continue to monitor forest cover loss using remote sensing data.

Text account compilers
Berryman, A.

Contributors
Benstead, P., Bird, J. & Khwaja, N.

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Recommended citation
BirdLife International (2024) Species factsheet: Buru Warbling-flycatcher Eumyias additus. Downloaded from https://datazone.birdlife.org/species/factsheet/buru-warbling-flycatcher-eumyias-additus 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.