Rahul Sharma (Editor)

Knobbed hornbill

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Kingdom  Animalia
Order  Bucerotiformes
Genus  Rhyticeros
Higher classification  Aceros
Phylum  Chordata
Family  Bucerotidae
Scientific name  Aceros cassidix
Rank  Species
Knobbed hornbill Knobbed hornbill videos photos and facts Aceros cassidix ARKive
Similar  Aceros, Bird, Hornbill, Wine‑throated hummingbird, Sulawesi hornbill

The knobbed hornbill (Rhyticeros cassidix), also known as Sulawesi wrinkled hornbill, is a colourful hornbill native to Indonesia. The species is sometimes placed in the genus Aceros. The knobbed hornbill is the faunal symbol of South Sulawesi province.


Knobbed hornbill Sulawesi redknobbed hornbill

Red knobbed hornbill


Knobbed hornbill Knobbed hornbill photo Aceros cassidix G141620 ARKive

This is a large black hornbill with 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 red casque on the top of his bill. The female has a black face and neck, a yellow casque, and brownish eyes.

Distribution and habitat

Knobbed hornbill Animal A Day Knobbed Hornbill

An Indonesian endemic, the knobbed hornbill is found in Sulawesi, Buton, Lembeh, Togian and Muna Island. It inhabits evergreen forest at an elevation of up to 1,800 m and also makes use of secondary forest, woodland and plantations for foraging.


Knobbed hornbill Harprit Singh Photography Photo Keywords hornbill

As with other hornbills, the knobbed hornbill is believed to be monogamous. Its diet consists mainly of fruits, but it will also take insects and small vertebrates. Breeding season spans 27–30 weeks and appears to be triggered by a dramatic reduction in rainfall. The female seals itself inside a tree hole for egg-laying using its own feces. During this time, the male will provide foods for the female and the young through a slit in the seal.

Knobbed hornbill Knobbed hornbill Wikipedia

Knobbed hornbills are important seed dispersers in their habitat and influence the initial fate of seeds of several tropical forest tree species.


Knobbed hornbill Sulawesi redknobbed hornbill

The species is currently classified as vulnerable by the IUCN. Despite being locally very common, they are threatened by habitat destruction from logging (since they depend on large and mature trees for breeding) and to some extent by hunting.

Knobbed hornbill Sulawesi redknobbed hornbill
Knobbed hornbill Knobbed Hornbill Rhyticeros cassidix Male individual the
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Knobbed hornbill Pictures and information on Knobbed Hornbill


Knobbed hornbill Wikipedia

Similar TopicsAceros