Aythya

Aythya
	Canvasback (Aythya valisineria)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Anseriformes
Family:	Anatidae
Subfamily:	Aythyinae
Genus:	Aythya; F. Boie, 1822
Species
	12 species, see text

Aythya is a genus of diving ducks. It has twelve described species. The name Aythya comes from the Ancient Greek word aithuia, which may have referred to a sea-dwelling duck or an auklet.^[1]

Aythya shihuibas was described from the Late Miocene of China. An undescribed prehistoric species is known only from Early Pleistocene fossil remains found at Dursunlu, Turkey;^[2] it might however be referrable to a paleosubspecies of an extant species considering its age (see also Greater Scaup).

The Miocene^{[verification needed]} "Aythya" arvernensis is now placed in Mionetta, while "Aythya" chauvirae seems to contain the remains of two species, at least one of which does not seem to be a diving duck.^[3]

Aythya species

Canvasback A. valisineria, Least Concern
Common pochard A. ferina, Least Concern
Redhead A. Americana, Least Concern
Ring-necked duck A. collaris, Least Concern
Hardhead A. australis, Least Concern
Baer's pochard A. baeri, Critically Endangered
Ferruginous duck A. nyroca, Near Threatened
Madagascar pochard A. innotata, Critically Endangered
New Zealand scaup A. novaeseelandiae, Least Concern
Tufted duck A. fuligula, Least Concern
Greater scaup A. marila, Least Concern
Lesser scaup A. affinis, Least Concern

Canvasback Aythya valisineria
Common pochard Aythya ferina
Redhead Aythya americana
Ring-necked duck Aythya collaris
Hardhead Aythya australis
Baer's pochard Aythya baeri
Ferruginous duck Aythya nyroca
Madagascar pochard Aythya innotata
New Zealand scaup Aythya novaeseelandiae
Tufted duck Aythya fuligula
Greater scaup Aythya marila
Lesser scaup Aythya affinis

References

^ Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 64. ISBN 978-1-4081-2501-4.
^ Louchart, Antoine; Mourer-Chauviré, Cécile; Guleç, Erksin; Howell, Francis Clark & White, Tim D. (1998): L'avifaune de Dursunlu, Turquie, Pléistocène inférieur: climat, environnement et biogéographie. C. R. Acad. Sci. Paris IIA 327(5): 341-346. [French with English abridged version] doi:10.1016/S1251-8050(98)80053-0 (HTML abstract)
^ Worthy, Trevor H.; Tennyson, A.J.D.; Jones, C.; McNamara, J.A. & Douglas, B.J. (2007): Miocene waterfowl and other birds from central Otago, New Zealand. J. Syst. Palaeontol. 5(1): 1-39. doi:10.1017/S1477201906001957 (HTML abstract)

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[1] Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 64. ISBN 978-1-4081-2501-4.

[2] Louchart, Antoine; Mourer-Chauviré, Cécile; Guleç, Erksin; Howell, Francis Clark & White, Tim D. (1998): L'avifaune de Dursunlu, Turquie, Pléistocène inférieur: climat, environnement et biogéographie. C. R. Acad. Sci. Paris IIA 327(5): 341-346. [French with English abridged version] doi:10.1016/S1251-8050(98)80053-0 (HTML abstract)

[3] Worthy, Trevor H.; Tennyson, A.J.D.; Jones, C.; McNamara, J.A. & Douglas, B.J. (2007): Miocene waterfowl and other birds from central Otago, New Zealand. J. Syst. Palaeontol. 5(1): 1-39. doi:10.1017/S1477201906001957 (HTML abstract)

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