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| Aythya | |
|---|---|
| File:Canvasback.arp.750pix.png | |
| Canvasback (Aythya valisineria) | |
Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Superorder: | Galloanserae |
| Clade: | Odontoanserae |
| Order: | Anseriformes |
| Family: | Anatidae |
| Subfamily: | Anatinae |
| Tribe: | Aythyini |
| Genus: | Aythya |
| Species | |
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12 species, see text | |
Aythya is a genus of diving ducks. It has twelve described species.
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[1]; 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 2 species, at least one of which does not seem to be a diving duck.[2]
Description[]
Bay ducks are medium to large ducks that often gather together in impressive rafts on coastal bays and large lakes in the winter.[3] They regularly hybridise with each other; often resembling other members of this genus and can be mistaken for a rare Tufted Duck or Common Pochard, which are vagrants to North America.[3]
Species[]
Listed alphabetically.
- Aythya affinis Lesser Scaup
- Aythya americana Redhead
- Aythya australis Hardhead
- Aythya baeri Baer's Pochard
- Aythya collaris Ring-necked Duck
- Aythya ferina Common Pochard
- Aythya fuligula Tufted Duck
- Aythya innotata Madagascar Pochard
- Aythya marila Greater Scaup
- Aythya trichaurea, Tuft-eared Duck[made-up sp.]
- Aythya novaeseelandiae New Zealand Scaup
- Aythya nyroca Ferruginous Duck
- Aythya valisineria Canvasback
References[]
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Wikimedia Commons has media related to: http://commons.wikimedia.org/wiki/Special:Search/Bay_duck |
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Wikispecies has information related to: http://species.wikimedia.org/wiki/Special:Search/Bay_duck |
- ^ 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)
- ^ a b Dunn, Jon L. and Alderfer, Jonathan (2011). National Geographic Completely Birds of North America. National Geographic Society. ISBN 9781426213731.
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