VU
Knobbed Hornbill Rhyticeros cassidix



References

del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

del Hoyo, J.; Elliott, A.; Sargatal, J. 2001. Handbook of the Birds of the World, vol. 6: Mousebirds to Hornbills. Lynx Edicions, Barcelona, Spain.

Kinnaird, M. F.; O'Brien, T. G. 1999. Breeding ecology of the Sulawesi Red-knobbed Hornbill, Aceros cassidix. Ibis 141: 60-69.

Kinnaird, M. F.; O'Brien, T. G. 2007. The ecology and conservation of Asian Hornbills: farmers of the forest. University of Chicago Press, Chicago, IL, USA.

Winarni, N. L.; Jones, M. 2012. Effect of anthropogenic disturbance on the abundance and habitat occupancy of two endemic hornbill species in Buton island, Sulawesi. Bird Conservation International 22: 222-233.

Further resources

IUCN SSC Hornbill Specialist Group

Search for photos and videos, and hear sounds of this species from the Macaulay Library

View photos and videos and hear sounds of this species from the Internet Bird Collection


Recommended citation
BirdLife International (2022) Species factsheet: Rhyticeros cassidix. Downloaded from http://www.birdlife.org on 27/09/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 27/09/2022.