The Sumba Hornbill is endemic to Sumba Island in Indonesia. It feeds at fruiting trees and is often seen in pairs.
The base of the bill is reddish in both sexes, and the tail is black. It is the only wreathed hornbill on Sumba with a black tail.
It feeds on fruit in remaining primary forest and nearby secondary woodland or cultivation with fruiting trees. It is usually seen in pairs, though groups may gather at fruiting trees.
An extinction-risk assessment has not been added yet.