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Wrinkled Hornbill - BirdForum Opus

(Redirected from Rhabdotorrhinus corrugatus)
Photo © by dixonlau
Sarawak, Malaysian Borneo, 13 October 2023
Rhabdotorrhinus corrugatus

Alternative name: Sunda Wrinkled Hornbill


Male and female
Photo by petersheikhli
Lower Kinabatangan, Sabah, Borneo, Malaysia, June 2006

From Wreathed Hornbill by smaller size,larger and more prominent reddish casque(in male) and black basal half of tail with the rest pale brownish.Bill yellowish;orbital skin blue.
Male-White neck and gular pouch.
Female-Black head and neck,pale blue gular pouch.
Underwing flight pattern all black wings,belly, and basal half of the tail with pale brownish tail distinctive.


Male, Flight
Photo by MountainMan
Lower Kinabatangan, Sabah, Borneo, Malaysia, April 2006

The Malay Peninsula to Sumatra and Borneo.
Uncommon to rare in many areas, locally common in Borneo and Sumatra. Threatened throughout range due to rapid depletion of lowland rainforest.


This is a monotypic species[1].
May form a superspecies with Walden's Hornbill, Writhed Hornbill and Knobbed Hornbill and even sometimes considered conspecific with Walden's Hornbill.
Formerly placed in the genus Aceros.


Lowland evergreen forest.


Feeds on fruit and some animal items when available.
Frequents the canopy in small groups, flying vast distances between roosting and feeding. Gathers to feed in fruiting trees.
Breeding little known. Nests in a natural cavity in a large tree.


  1. 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/
  2. 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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