Sumba Hornbill Rhyticeros everetti

Family: Bucerotidae (Hornbills)

Authority: (Rothschild, 1897)

Red List Category

Criteria: A2cd+3cd+4cd;B1ab(ii,iii,iv,v);C1+2a(ii)

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Justification of Red List category
This species qualifies as Vulnerable because it has a small population and a small range which is severely fragmented, both of which are declining owing to rapid forest loss. However, it has been proposed that the population size is lower than suggested here and that it may undergo extremely rapid population declines in the future; hence a higher threat category may be warranted.

Population size: 2500-9999

Population trend: Decreasing

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

Country endemic: Yes

Land-mass type - oceanic island
Realm - Oceanic
IUCN Ecosystem -- Terrestrial biome

Recommended citation
BirdLife International (2020) Species factsheet: Rhyticeros everetti. Downloaded from on 19/02/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from on 19/02/2020.