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). 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 is 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.
The global population is estimated to number 200,000 mature individuals (Partners in Flight 2019).
The species is undergoing a moderate decline (Partners in Flight 2019). A remote sensing study found that forest within its range has been lost at a rate of 7% over three generations (Tracewski et al. 2016). Assuming that forest loss is continuing at this rate and population declines are proportional to forest loss, the species may be declining at < 10% over three generations.
Major threats include deforestation, which is leading to loss of suitable tree snail prey, and locally persecution by farmers, who mistakenly believe the species preys upon chickens (Ferguson-Lees and Christie 2001).
Text account compilers
Ekstrom, J. & Butchart, S.
BirdLife International (2022) Species factsheet: Chondrohierax uncinatus. Downloaded from http://www.birdlife.org on 30/06/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 30/06/2022.