The Knobbed Hornbill lives in forests on Sulawesi and nearby islands. A large casque rises above its bill.
A high casque sits on its large bill. Adult males have a brown head and red casque, while females have a black head and yellow casque.
It feeds mainly on fruit in the forest canopy. Outside the breeding season it may travel widely in search of fruiting trees.
An extinction-risk assessment has not been added yet.