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 common to uncommon (del Hoyo et al. 1999).
Although tolerant of modified habitats, the species is nevertheless suspected to be undergoing some declines overall.
The species is threatened by removal of primary rainforest habitat, particularly in Sumatra, Borneo and Java (König and Weick 2008).
Text account compilers
Butchart, S., Ekstrom, J., Symes, A., Taylor, J. & Ashpole, J
BirdLife International (2021) Species factsheet: Ninox scutulata. Downloaded from http://www.birdlife.org on 21/10/2021. Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 21/10/2021.