Alternative names: Butung Hornbill; Red-knobbed Hornbill; Sulawesi Wrinkled Hornbill; Celebes Wrinkled Hornbill
- Rhyticeros cassidix
Identification
70-80cm. A large hornbill with a white tail and a high casque.
Male
- 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
Female
- 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
Distribution
Endemic to Sulawesi (Indonesia) and some adjacent offshore islands (Lembeh, Togian Islands, Muna and Butung).
Locally common.
Taxonomy
This is a monotypic species.
May form a superspecies with Walden's Hornbill, Wrinkled Hornbill and Writhed Hornbill.
Formerly placed in genus Aceros.
Habitat
Evergreen forest. Occurs up to 1800m.
Behaviour
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.
References
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2015. The eBird/Clements checklist of birds of the world: v2015, with updates to August 2015. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
- 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
Recommended Citation
- BirdForum Opus contributors. (2025) Knobbed Hornbill. In: BirdForum, the forum for wild birds and birding. Retrieved 27 April 2025 from https://www.birdforum.net/opus/Knobbed_Hornbill
External Links
GSearch checked for 2020 platform.1
