Family: Bucerotidae (Hornbills)

Authority: (Rothschild, 1897)

Red List Category

Criteria: A2cd+3cd+4cd; C2a(ii)

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Justification of Red List category
Sumba Hornbill has been assessed as Endangered because it has a small declining population, with very rapid population reductions suspected to be ongoing owing to rapid habitat loss from selective logging, deforestation and degradation from clearance including through the use of fires. In particular, the loss and degradation of large (<10km²) forest patches, and removal of suitable nesting trees from within apparently suitable areas, appear to be severely impacting the species. 

Population size: 1000-2000 mature individuals

Population trend: decreasing

Extent of occurrence (breeding/resident): 13,100 km²

Country endemic: yes

Attributes
Land-mass type - oceanic island
Realm - Oceanian
IUCN System - Terrestrial