Male and female greater scaup Aythya marila, photographed by Greg.

Belongs within: Anatinae.

Aythya is a genus of diving ducks, including pochards and scaups. Diving ducks have a short, heavy body, with large legs placed further back and wider apart than those of other ducks, a strong lobe or flap on the hind toe, and pale rather than metallic specula on the wings (Austin 1961). They are usually gregarious, often forming large flocks.

<==Aythya Boie 1822 (see below for synonymy) CC10
    |  i. s.: A. baeri (Radde 1863) I92
    |         ‘Nyroca’ capensis [=Fuligula capensis] K08
    |         A. chauvirae Cheneval 1987 M02
    |         A. innotata JT12
    |--+--A. australis (Eyton 1838) JT12, WS48 (see below for synonymy)
    |  `--A. nyroca (Güldenstädt 1770) JT12, CC10 [=Anas nyroca M02, *Ilyonetta nyroca CC10, *Nyroca nyroca CC10]
    `--+--+--+--A. fuligula (Linnaeus 1758) JT12, M02 (see below for synonymy)
       |  |  `--A. novaeseelandiae (Gmelin 1789) (see below for synonymy) CC10
       |  `--+--*A. marila CC10, JT12 [=Anas marila CC10]
       |     |    |--A. m. marila VP89
       |     |    `--A. m. mariloides VP89
       |     `--A. affinis JT12 [=Marila affinis D56]
       `--+--+--A. americana JT12
          |  `--A. collaris JT12 [=Anas collaris CC10, *Perissonetta collaris CC10]
          `--+--A. ferina (Linnaeus 1758) JT12, M02 (see below for synonymy)
             `--A. valisineria JT12

Aythya Boie 1822 [incl. Fuligula Stephens in Shaw 1824, Fulix Sundevall 1836, Ilyonetta Heine & Reichenow 1890, Marila Reichenbach 1852, Nyroca Flemming 1822, Perissonetta Oberholser 1920, Zeafulix Mathews 1937] CC10

Aythya australis (Eyton 1838) JT12, WS48 [=Nyroca australis WS48; incl. A. australis ledeboeri Bartels & Franck 1938 CC10, N. nyroca dampieri Mathews 1912 WS48]

Aythya ferina (Linnaeus 1758) JT12, M02 [=Anas ferina M02, Fuligula ferina M02, *Marila ferina CC10, Nyroca ferina CC10]

Aythya fuligula (Linnaeus 1758) JT12, M02 [=Anas fuligula M02, *Fuligula fuligula CC10, *Fulix fuligula CC10; incl. Anas cristata Fischer 1778 CC10, Fuligula cristatus L81]

Aythya novaeseelandiae (Gmelin 1789) [=Anas novaeseelandiae, Anas novaezealandiae, Fuligula novaeseelandiae, Fuligula novaezealandiae, Fulix novaeseelandiae, Marila novaezelandiae, Nyroca novaeseelandiae, *Zeafulix novaeseelandiae; incl. Anas atra Ellman 1861, Anas atricilla Forster in Lichtenstein 1844, Zeafulix novaeseelandiae maui Mathews 1937] CC10

*Type species of generic name indicated


Austin, O. L., Jr. 1961. Birds of the World: A survey of the twenty-seven orders and one hundred and fifty-five families. Paul Hamlyn: London.

[CC10] 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 and Te Papa Press: Wellington.

[D56] Dawes, B. 1956. The Trematoda with special reference to British and other European forms. University Press: Cambridge.

[I92] Iwahashi, J. (ed.) 1992. Reddo Deeta Animaruzu: a pictorial of Japanese fauna facing extinction. JICC: Tokyo.

[JT12] Jetz, W., G. H. Thomas, J. B. Joy, K. Hartmann & A. Ø. Mooers. 2012. The global diversity of birds in space and time. Nature 491: 444–448.

[K08] Kellogg, V. L. 1908. Wissenschaftliche Ergebnisse der Schwedischen Zoologischen Expedition nach dem Kilimandjaro, dem Meru und den Umgebenden Massaisteppen Deutsch-Ostafrikas 1905–1906, 15. Corrodentia, 4. Mallophaga. Almqvist & Wiksells Boktryckeri-A. B.: Uppsala.

[L81] Long, J. L. 1981. Introduced Birds of the World: The worldwide history, distribution and influence of birds introduced to new environments. Reed: Sydney.

[M02] Mlíkovský, J. 2002. Cenozoic Birds of the World. Part 1: Europe. Ninox Press: Praha.

[VP89] Viney, C., & K. Phillipps. 1989. Birds of Hong Kong 5th ed. Government Printer: Hong Kong.

[WS48] Whittell, H. M., & D. L. Serventy. 1948. A systematic list of the birds of Western Australia. Public Library, Museum and Art Gallery of Western Australia, Special Publication 1: 1–126.

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