Helmeted Hornbill Rhinoplax vigil


Abdul Kadir Abu Hashim. 2002. Sumatran Rhinoceros and wildlife survey at Gunung Basor and Gunung Anak Noring (Perak-Kelantan) from 24th – 31st July 2002. Journal of Wildlife and Parks 20: 27-36.

Beastall, C.; Shepherd, C. R.; Hadiprakarsa, Y.; Martyr, D. 2016. Trade in the Helmeted Hornbill Rhinoplax vigil: the 'ivory hornbill'. Bird Conservation International 26: 137-146.

Bird, J.P., Martin, R., Akçakaya, H.R., Gilroy, J., Burfield, I.J., Garnett, S.G., Symes, A., Taylor, J., Şekercioğlu, Ç.H. and Butchart, S.H.M. 2020. Generation lengths of the world’s birds and their implications for extinction risk. Conservation Biology 34(5): 1252-1261.

BirdLife International. 2001. Threatened birds of Asia: the BirdLife International Red Data Book. BirdLife International, Cambridge, U.K.

Chin, C.L.M. and Jantan, S.M. 1999. Hunting Patterns and Wildlife Densities in Primary and Production Forests in the Upper Baram-Tentative Results. In: Bennett, E.L. and Chin, C (eds), Proceedings of the Third Workshop on Sarawak's National Parks and Wildlife, pp. 149-163. Sarawak: Forest Department.

Chong, M.H.N. 1993. The distribution, status and conservation of hornbills and their habitats in Peninsular Malaysia. In: Poonswad, P. and Kemp, A.C (eds), Manual to the Conservation of Asian Hornbills, pp. 342-370. Thailand Hornbill Project., Bangkok.

Chong, M.H.N. 1998. A survey of hornbills in rain forest habitats of Peninsular Malaysia. In: Poonswad, P (ed.), The Asian Hornbills: Ecology and Conservation (Thai Studies in Biodiversity No. 2), pp. 13-22. Thailand: National Center for Genetic Engineering and Biotechnology.

Chong, M.H.N. 2011. Observations on the breeding biology of Helmeted Hornbill in Pahang, peninsular Malaysia. The Raffles Bulletin of Zoology 24: 163-165.

Choo, J.H. and Teresa, O. 2001. Bird checklist of Bukit Rengit, Lanchang, Pahang. Journal of Wildlife and Parks 19: 109-122.

Choo, J.P.S. 2000. An Inter-Continental Comparison of Avian Frugivore-Fruit Mutualisms: Phase 1 - Gunung Mulu National Park, Sarawak. Preliminary Findings. In: Bennett, E.L., Chin, C.L.M. and Rubis, J (eds), Proceedings of the Fourth Workshop on Sarawak's National Parks and Wildlife, pp. 177-191. Sarawak: Forest Department.

Chung, A. Y. C. 2006. Biodiversity and Conservation of the Melinau Range: A Rain Forest in Sabah's Ultramafic Belt. Kota Kinabalu: Natural History Publications , Borneo.

Cochrane, M. A. 2001. Synergistic interactions between habitat fragmentation and fire in evergreen tropical forest. Conservation Biology 15(6): 1515 – 1521.

Collar, N.J. 2015. Helmeted Hornbills Rhinoplax vigil and the ivory trade: the crisis that came out of nowhere. BirdingASIA 24: 12-17.

Davies, G. and Payne, J. 1982. A Faunal Survey of Sabah. Kuala Lumpur: WWF-Malaysia.

Davison, G. W. H. 1987. The Birds of Ulu Endau, Johore, Malaysia, with Special Reference to Birds of Heath and Fan Palm Forests. Malayan Nature Journal 31(2&3): 425-433.

Davison, G. W. H. 1995. The birds of Temengor Forest Reserve, Hulu Perak, Malaysia. Malayan Nature Journal 48(3&4): 371-386.

EIA. 2015. Sin City – Illegal wildlife trade in Laos’ Golden Triangle Special Economic Zone. Environmental Investigation Agency, London, U.K.

Fogden, M.P.L. 1965. Borneo bird notes 1963-65. Sarawak Museum Journal XII (n.s. 25-26): 395-414.

Hii, R. 2015. Helmeted Hornbills on the Verge of Extinction. Huffington Post. Available at: (Accessed: 29/09/2015).

Hughes, A. 2015. Not just rhinos: Hornbill horns fetch stunning prices in illegal wildlife trade. Alliance of Leading Environmental Researchers and Thinkers. Available at: (Accessed: 29/09/2015).

IUCN. 2020. The IUCN Red List of Threatened Species. Version 2020-3. Available at: (Accessed: 10 December 2020).

Jain A., Lee J. G. H., Chao N., Lees C., Orenstein R., Strange B. C., Chng S. C. L., Marthy W., Yeap C. A., Hadiprakarsa Y. Y. and Rao M. (Eds). 2018. Helmeted Hornbill (Rhinoplax vigil): Status Review, Range-wide Conservation Strategy and Action Plan (2018-2027). IUCN Species Survival Commission Hornbill Specialist Group.

Johns, A. G. 2004. Timber Production and Biodiversity Conservation in Tropical Rain Forests. Cambridge University Press, UK.

Johns, A.D. 1987. The Use of Primary and Selectively Logged Rainforest by Malaysian Hornbills (Bucerotidae) and Implications for their Conservation. Biological Conservation 40: 179-190.

Kaur , R., Sanjitpaal, S. and Abdul Hamid Ahmad. 2015. The breeding biology of the Great Hornbill Buceros bicornis, Rhinoceros Hornbill Buceros rhinoceros and Helmeted Hornbill Rhinoplax vigil in the Temengor Forest Reserve, Perak, Malaysia.

Kaur, R., Sanjitpaal, S., Ramli, R., Hassan, H., Majinun, A., Ancrenaz, M., Ratag, M., Rauf, H.A., Jamal, J., Rauf, A.S.A., Yunus, M.D.M., Arbani, M.A., Asmar, K. and Amir, M.A. 2018. Observations at a nest of Helmeted Hornbill Rhinoplax vigil in Borneo, Malaysia. Forktail 34(68-73).

Kemp, A. C.; Kemp, M. I. 1974. Report on a Study of Hornbills in Sarawak with Comments on their Conservation. (World Wildlife Fund Project No. MYS 2/74). . WWF-Malaysia, Kuala Lumpur, Malaysia.

Kemp, A.C., Sharpe, C.J. and Boesman, P. 2014. Helmeted Hornbill (Rhinoplax vigil). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. and de Juana, E. (eds), Handbook of the Birds of the World Alive, Lynx Edicions, Barcelona.

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.

Kitamura, S.; Thong-Aree, S.; Madsri S.; Poonswad, P. 2011. Characteristics of hornbill-dispersed fruits in lowland dipterocarp forests of southern Thailand. The Raffles Bulletin of Zoology: 137-147.

Lakim, M.B. and Biun, A. 2005. A preliminary survey of hornbills within National Parks of Sabah, Malaysia. In: Lum, S. and Poonswad, P (eds), The ecology of hornbills: reproduction and populations, Bangkok: Pimdee Karnpim Co. Ltd.

Lim, K.C. and Tan, M. 2000. Bird observations in Belum Forest Reserve, Perak, Peninsular Malaysia. Malayan Nature Journal 54(3): 259-265.

Lum, S.; Poonswad, P. 2005. The Ecology of Hornbills: Reproduction and Populations. Pimdee Karnpim Co., Ltd., Bangkok.

Medway, Lord and Wells, D.R. 1971. Diversity and density of birds and mammals at Kuala Lompat. Malayan Nature Journal 24(3&4): 238-247.

Meijaard, E., Sheil, D., Nasi, R., Augeri, D., Rosenbaum, B., Iskandar, D., Setyawati, T., Lammertink, M., Rachmatika, I., Wong, A., Soehartono, T., Stanley, S. and O'Brien, T. 2005. Life after logging - Reconciling wildlife conservation and production forestry in Indonesian Borneo. CIFOR and UNESCO, Jakarta.

Norsham, Y. and Ong, T. 2001. Vertebrate fauna of compartment 14, Sugai Lalang Forest Reserve, Selangor. Journal of Wildlife and Parks 19: 1-16.

Nur Atiqah Tahir. 2015. Helmeted Hornbill: A Diamond in the Rough. Malaysian Naturalist 69(2): 36-37.

Ong, T., Choo, J.H., Mat Isa and Lim, B.L. 2000. Birds. Journal of Wildlife and Parks 18: 29-48.

Phassaraudomsak, M., Krishnasamy, K. and Chng, S.C.L. 2019. Trading Faces: Online trade of Helmeted and other hornbill species on Facebook in Thailand. TRAFFIC, Southeast Asia Regional Office, Petaling Jaya, Malaysia.

Poonswad, P., Kemp, A.C. & Strange, M. 2013. Hornbills of the World: A Photographic Guide. Draco Publishing and Hornbill Research Foundation.

Sheldon, F.H., Moyle, R.G. and Kennard, J. 2001. Ornithology of Sabah: History, Gazetteer, Annotated Checklist, and Bibliography. Ornithological Monographs No. 52. Washington, D.C.: The American Ornithologists' Union.

Siti Hawa Yatim, Zainuddin Baatu and Mat Isa Marzuki. 1986. Survey of mammal and bird species at eight Game/Forest Reserves. Journal of Wildlife and Parks 5(24-52).

Siti Hawa Yatim, Zainuddin Baatu, Khirull Anuar Saaidun and Mat Isa Marzuki. 1985. Survey of mammal and bird species in six different habitats: mangrove, lowland dipterocarp, montane oak and montane ericaceous forest. Journal of Wildlife and Parks 4: 67-91.

Siti Hawa Yatim. 1993. Status and biology of hornbills in Peninsular Malaysia. In: Poonswad, P. and Kemp, A.C (eds), Manual to the Conservation of Asian Hornbills, pp. 372-386. Bangkok: Thailand Hornbill Project.

Smythies, B.E. 1999. The Birds of Borneo: 4th Edition. Revised by G.W.H. Davison. Natural History Publications (Borneo), Kota Kinabalu.

Styring, A.R., Ragai, R., Unggang, J., Stuebing, R., Hosner, P.A. and Sheldon, F.H. 2011. Bird community assembly in Bornean industrial tree plantations: Effects of forest age and structure. Forest Ecology and Management 261(3): 531-544.

Tracewski, L.; Butchart, S.H.M.; Di Marco, M.; Ficetola, G.F.; Rondinini, C.; Symes, A.; Wheatley, H.; Beresford, A.E. and Buchanan, G.M. 2016. Toward quantification of the impact of 21st-century deforestation on the extinction risk of terrestrial vertebrates. Conservation Biology 30(5): 1070-1079.

Trisurat, Y.; Chimchome, V.; Pattanavibool, A.; Jinamoy, S.; Thongaree, S.; Kanchanasakha, B.; Simcharoen, S.; Sribuarod, K.; Mahannop, N.; Poonswad. P. 2013. An assessment of the distribution and conservation status of hornbill species in Thailand. Oryx 47: 441-450.

Utoyo, L.; Marthy, W.; Noske, R. A.; Surahmat, F. 2017. Nesting cycle and nest tree characteristics of the Helmeted Hornbill Rhinoplax vigil, compared to the Wreathed Hornbill Rhyticeros undulatus, in Sumatran lowland rainforest. Kukila 20: 12-22.

Further resources

IUCN SSC Hornbill Specialist Group

Detailed species accounts from the Threatened birds of Asia: the BirdLife International Red Data Book (BirdLife International 2001).

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

Media resources

Recommended citation
BirdLife International (2023) Species factsheet: Rhinoplax vigil. Downloaded from on 10/06/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from on 10/06/2023.