Alternative names: Butung Hornbill; Red-knobbed Hornbill; Sulawesi Wrinkled Hornbill; Celebes Wrinkled Hornbill
- Aceros cassidix
70-80cm. A large hornbill with a white tail and a high casque.
- Black body
- Deep rufous crown and nape
- Paler rufous to creamy head sides and neck
- Yellow bill with orange and brown ridged base, red wrinkled casque
- Pale blue bare skin around eye
- Dark blue and black bare throat skin
- Smaller than male
- Black head and neck
- Yellow casque
- Throat skin with only small black band
Juveniles like adult male but with a small, plain yellow bill without casque
Endemic to Sulawesi (Indonesia) and some adjacent offshore islands (Lembeh, Togian Islands, Muna and Butung).
This is a monotypic species.
May form a superspecies with Walden's Hornbill, Wrinkled Hornbill and Writhed Hornbill
Evergreen forest. Occurs up to 1800m.
The diet consists mainly of fruits and figs. Takes also some insects, bird eggs and nestlings.
Forages mainly in the canopy.
Breeding season starts June to September. The nest is placed in a natural hole in a large tree. The female sealed itself inside a tree hole for egg-laying. During this time, the male will provide foods for the female and the young. Raises usually one chick.
- Clements, JF. 2011. The Clements Checklist of Birds of the World. 6th ed., with updates to August 2011. Ithaca: Cornell Univ. Press. ISBN 978-0801445019. Spreadsheet available at http://www.birds.cornell.edu/clementschecklist/downloadable-clements-checklist
- Del Hoyo, J, A Elliot, and J Sargatal, eds. 2001. Handbook of the Birds of the World. Volume 6: Mousebirds to Hornbills. Barcelona: Lynx Edicions. ISBN 978-8487334306
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