• Summary
• Text account
• Data table and detailed info
• Range map
• Resources

Justification of Red List category
This species has a large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (extent of occurrence <20,000 km² combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The species is not thought to be decreasing and hence does not meet or approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is unknown but probably very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Population justification
The global population size has not been quantified, but the species is reported to be common to very common (Coates et al. 1997, Eaton et al. 2021).

Trend justification
The population is suspected to be stable in the absence of evidence for any declines or substantial threats. Remote sensing data (Global Forest Watch 2022, using data from Hansen et al. [2013] and methods disclosed therein) indicate minimal (<2%) forest loss in this species' range and it is tolerant of forest edge and moderately degraded habitats (Eaton et al. 2021).

Occurs throughout Sulawesi, Indonesia, except for South Sulawesi where replaced by P. sarasinorum.

Inhabits humid montane forest above 600 m (Eaton et al. 2021).

The only plausible threat to this species is forest loss, although this is currently occurring at a rate so slow that declines cannot be assumed.

Conservation Actions UnderwayNone specific to this species, but occurs in numerous protected areas.
Conservation Actions ProposedContinue to monitor forest loss data.

Text account compilers
Berryman, A.

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Recommended citation
BirdLife International (2025) Species factsheet: Sulawesi Leaf-warbler Phylloscopus nesophilus. Downloaded from https://datazone.birdlife.org/species/factsheet/sulawesi-leaf-warbler-phylloscopus-nesophilus on 05/01/2025.
Recommended citation for factsheets for more than one species: BirdLife International (2025) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 05/01/2025.