Justification of Red List Category
Although this species may have a restricted range, it is not believed to 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). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to 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 described as still common, although poorly known (Madge and McGowan 2002).
This population is suspected to be stable in the absence of evidence for any declines or substantial threats.
This species is restricted to mountainous areas in northern and central Sumatra, Indonesia.
The species is reported to be common in upper dipterocarp, lower montane and tall upper montane forest from 500-2,200 m (del Hoyo et al. 1994).
The species is currently under limited threat from logging or development, and as such is thought unlikely to be suffering significant declines.
Text account compilers
BirdLife International (2021) Species factsheet: Arborophila rolli. Downloaded from http://www.birdlife.org on 23/09/2021. Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 23/09/2021.