IUCN threat status:

Vulnerable (VU)

Distribution

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Range Description

This species is endemic to the island of Sumba, Nusa Tenggara, Indonesia. Fieldwork since 1989 previously resulted in a tentative population estimate of 4,000 individuals (based on a density of 2.3 hornbills/km2, and an estimated 1,732 km2 total forest-cover) (BirdLife International 2001). Recent research on the population size needs to be reconciled, as estimates have ranged from 1,650 mature individuals on the whole island (based on delayed maturation and its near absence from small forest patches) (T. O'Brien in litt. 2010), to 6,400 individuals solely in the Manupeu-Tanadaru National Park (D. Mulyawati in litt. 2010). Although some areas of habitat are well protected (D. Mulyawati in litt. 2010), the species is likely to be declining overall owing to continued forest loss outside of reserves (T. O'Brien in litt. 2010), and future declines may be extremely rapid (Kinnaird and O'Brien 2007).

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Source: IUCN

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