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

Justification of Red List category
This species has an extremely 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 population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size has not been quantified, but it is not believed to 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 fairly common and locally abundant. The species is reported to be abundant on Oahu where it was introduced (Pratt et al. 1987, Baker 1997). National population estimates include: c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in China; > c.10,000 individuals on migration and > c.10,000 wintering individuals in Taiwan; c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in Korea; < c.50 individuals on migration and < c.50 wintering individuals in Japan and c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in Russia (Brazil 2009).

Trend justification
The population is suspected to be stable in the absence of evidence for any declines or substantial threats.

Text account compilers
Ekstrom, J., Butchart, S.

Recommended citation
BirdLife International (2024) Species factsheet: Korean Bush-warbler Horornis canturians. Downloaded from https://datazone.birdlife.org/species/factsheet/korean-bush-warbler-horornis-canturians on 22/12/2024.
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 22/12/2024.