Data Zone
Justification of Red List category
This species has a very 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 is not known, but the population is not believed to be decreasing sufficiently rapidly to approach the thresholds 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 locally uncommon to common (del Hoyo et al. 2001).
Text account compilers
Butchart, S., Ekstrom, J.
Contributors
Dowsett, R.J.
Recommended citation
BirdLife International (2024) Species factsheet: Black-and-white-casqued Hornbill Bycanistes subcylindricus. Downloaded from
https://datazone.birdlife.org/species/factsheet/black-and-white-casqued-hornbill-bycanistes-subcylindricus on 23/12/2024.
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 23/12/2024.