Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This hornbill is listed as Endangered because it is suspected that its very small population, which is restricted to one tiny island, consists of fewer than 250 mature individuals. Its population appears to be stable despite some degree of hunting and habitat degradation.
50-249 mature individuals
Distribution size (breeding/resident):
Land-mass type - oceanic island - Oceanic islands are islands or island groups that are <200,000 sq km in size and separated from other land masses by >200 m sea depth. Generally Oceanic islands are islands or island groups that are <200,000 sq km in size and separated from other land masses by >200 m sea depth. Generally they have never been connected to a continental area by a land-ridge, and are volcanic in origin.
Realm - Indomalayan - realm
IUCN Ecosystem -- Terrestrial biome