Oxyura vantetsi Worthy, 2005:263

New Zealand stiff-tailed duck, New Zealand blue-billed duck, Van Tets' duck (proposed)



Taxonomy & Nomenclature

Synonym/s: Oxyura australis; Horn 1983, Journ. Royal Soc. N.Z. 13: 67. Not Oxyura australis Gould, 1837.; Oxyura australis; Checklist Committee 1990, Checklist Birds N.Z.: 107. Not Oxyura australis Gould, 1837.


Conservation Status


Last record: Holocene



North Island, New Zealand


Biology & Ecology




Holotype: NMNZ S.001081

Type locality: Poukawa XII.2, North Island, New Zealand



NMNZS.3370 (right humerus)

NMNZ S.3527 (right humerus)

NMNZ S.5915 (left humerus)

NMNZ S.9745 (left humerus)

NMNZ S.12165 (left humerus)

NMNZ S.13730 (right humerus)

NMNZ S.20605 (right humerus)



Above: New Zealand Stiff-tailed Duck. Oxyura vantetsi. From the series: Extinct Birds of New Zealand., 2005, Masterton, by Paul Martinson. Purchased 2006. © Te Papa. CC BY-NC-ND 4.0. Te Papa (2006-0010-1/30)



Original scientific description:

Worthy, Trevor H. (2005). A new species of Oxyura (Aves: Anatidae) from the New Zealand Holocene. Longmann Symposium, Memoirs of the Queensland Museum 51(1): 259-275. [automatic download]


Other references:

Checklist Committee (OSNZ). (2010). Checklist of the Birds of New Zealand, Norfolk and Macquarie Islands, and the Ross Dependency, Antarctica (4th ed.). Ornithological Society of New Zealand & Te Papa Press, Wellington. [p. 37]

Checklist Committee (OSNZ). (2022). Checklist of the Birds of New Zealand (5th edition). Ornithological Society of New Zealand Occasional Publication No. 1. Wellington: Ornithological Society of New Zealand. [p. 29]

Horn, P. L. (1983). Subfossil avian remains from Poukawa, Hawkes Bay, and the first record of Oxyura australis (Blue-billed Duck) from New Zealand. Journal of the Royal Society of New Zealand 13: 67-78.

Hugh Robertson, John Dowding, Graeme Elliott, Rod Hitchmough, Colin Miskelly, Colin O’Donnell, Ralph Powlesland, Paul Sagar, Paul Scofield, Graeme Taylor. (2013). Conservation status of New Zealand birds, 2012. New Zealand Threat Classification Series 4. 22 pp.

Hume, Julian Pender and Walters, Michael. (2012). Extinct Birds. London: T & AD Poyser. 544 pp.

Robertson, H. A., Baird, K. A., Elliott, G. P., Hitchmough, R. A., McArthur, N. J., Makan, T. D., Miskelly, Colin M., O’Donnell, C. F. J., Sagar, P. M., Scofield, R. P., Taylor, G. A. and Michel, P. (2021). Conservation status of birds in Aotearoa New Zealand, 2021. New Zealand Threat Classification Series 36. Department of Conservation, Wellington. 43 pp.

Sayol, Ferran, Steinbauer, Manuel J., Blackburn, Tim M., Antonelli, Alexandre and Faurby, Søren. (2020). Anthropogenic extinctions conceal widespread evolution of flightlessness in birds. Science Advances 6(49): eabb6095. [Supplementary Material (Data File S1)]

Scofield P, Worthy TH, and Schlumpf H (2003) What birds were New Zealand’s 5 rst people eating? Wairau Bar’s avian remains re-examined. Records of the Canterbury Museum 17, 17–35.

Tennyson, Alan J. D. and Bartle, J. A. (2008). Catalogue of type specimens of birds in the Museum of New Zealand Te Papa Tongarewa. Tuhinga 19: 185-207.

Tennyson, Alan J. D. and Martinson, P. (2006). Extinct Birds of New Zealand. Te Papa Press, Wellington. [p. 48]

Tyrberg, Tommy. (2009). Holocene avian extinctions, pp. 63-106. In: Turvey, Samuel T. (ed.). Holocene Extinctions. Oxford, UK & New York, USA: Oxford University Press. xii + 352 pp.

Worthy, Trevor H. (2004). The Holocene fossil waterfowl fauna of Lake Poukawa, North Island, New Zealand. Tuhinga 15: 77-120.


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