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.
The global population size has not been quantified, but the species is reported to be fairly common to uncommon (Grimmett et al. 1998, Robson 2000), while the population in Taiwan has been estimated at c.100-10,000 breeding pairs (Brazil 2009).
The species is suspected to be stable in the absence of evidence for any declines or substantial threats.
Text account compilers
Butchart, S., Ekstrom, J., Hermes, C.
BirdLife International (2022) Species factsheet: Oriolus traillii. Downloaded from http://www.birdlife.org on 04/07/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 04/07/2022.