Thaumatibis gigantea (Oustalet, 1877)

Giant Ibis



Taxonomy & Nomenclature

Synonym/s: Pseudibis gigantea (Oustalet, 1877:25)


Conservation Status

Last Record: 1962

Rediscovered in 1993

IUCN RedList status: Critically Endangered



Cambodia, Laos & Viet Nam


Biology & Ecology










Original scientific description:

(Oustalet) 1877 Bull.Soc.Philom.(7) 1 p.25

Other references:

An Dara. 2008. Agricultural expansion and its effects on breeding habitat of Giant Ibis Pseudibis gigantea in Kulen Promtep Wildlife Sanctuary, northern Cambodia. MSc Thesis, Tokyo University of Agriculture and Technology, Department of International Environmental and Agricultural Science.

Anon. 2003. Endangered species rediscovered in Yok Don National Park, Dak Lak province. The Babbler: BirdLife in Indochina 2(2): 12-13.

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

BirdLife International. (2016). Thaumatibis gigantea. The IUCN Red List of Threatened Species 2016: e.T22697536A93619897. Downloaded on 14 February 2017.

Chanratana, Pin, Bou V., Eames, J. C., Samorn V. and Thol S. (2020). The first population assessment of the Critically Endangered giant ibis Thaumatibis gigantea in Lomphat Wildlife Sanctuary, Cambodia. Cambodian Journal of Natural History (1): 7-14.

Claassen, A. H. and Ou, R. (2007). A stream and wetland survey of southwestern Phnom Prich Wildlife Sanctuary and adjacent areas, with a focus on large waterbirds. WWF Greater Mekong,Cambodia Country Programme., Phnom Penh.

Hance, J. 2012. Giant ibis discovered in new region of Cambodia. The Babbler 40: 16.

Keo, O. 2008. Ecology and conservation of the Giant Ibis Thaumatibis gigantea in Cambodia. BirdingASIA 9: 100-106.

Keo, O.; Collar, N. J.; Sutherland, W. J. 2009. Nest protectors provide a cost-effective means of increasing breeding success in Giant Ibis Thaumatibis gigantea. Bird Conservation International 19(1): 77-82.

Loveridge, R. and Ty, S. 2015. Ten-year species action plan for the Giant Ibis Thaumatibis gigantea in Cambodia. 2015-2025. Phnom Penh, Cambodia.

Sum, P. and Bou, V. 2012. Encouraging Community Involvement in the Conservation of White-shouldered Ibis in Lomphat Wildlife Sanctuary. Final Report to Chicago Board of Trade Endangered Species Fund. BirdLife International Cambodia Programme, Chicago Zoological Society.

Thewlis, R.M. & Timmins, R.J. (1996) The rediscovery of giant ibis Pseudibis gigantea with a review of previous records. Bird Conservation International, 6, 317–324.

Ty, S. 2013. Key factors potentially influencing the occurrence of the critically endangered Giant Ibis Thaumatibis gigantea during the breeding season (April to June) in Western Siem Pang proposed protected forest, Northeast Cambodia. Cambodian Journal of Natural History 2: 121.

WCS/FA. 2006. Threatened Species of the Seima Biodiversity Conservation Area. Wildlife Conservation Society - Cambodia Program, and Forestry Administration., Phnom Penh, Cambodia.

Wright, H.L., Collar, N.J., Lake, I.R., Vorsak, B. and Dolman, P.M. 2012. Foraging ecology of sympatric White-shouldered Ibis Pseudibis davisoni and Giant Ibis Thaumatibis gigantea in northern Cambodia. Forktail 28: 93-100.


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