The Knobbed Hornbill, Aceros cassidix – also known as Sulawesi Wrinkled Hornbill – is an Indonesian endemic that occurs in the tropical evergreen forests of Sulawesi, Buton, Lembeh, Togian and Muna Island.
This large black hornbill has a yellow bill, white tail feathers, pale blue skin around eye, blackish feet and bare dark blue throat.
The male has rufous buff face and neck, orange-red eyes and a high reddish casque (a large display growth on the upper mandible of the bill).
he female has black face and neck, yellow casque and brownish eyes.
Diet / Feeding
They mostly feed on fruits and figs.
Breeding / Nesting
The Knobbed Hornbill is believed to be a monogamous species (loyal to one mate)..
The female seals herself inside a tree hole for egg-laying to keep out predators.
During this time, the male will provide foods for the female and the chicks through a small opening.
Species Research by Sibylle Johnson
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