Species
- Blue-billed Duck, Oxyura australis
- New Zealand Stiff-tailed Duck, Oxyura vantetsi (prehistoric)
- Ruddy Duck, Oxyura jamaicensis
- White-headed Duck, Oxyura leucocephala
- Maccoa Duck, Oxyura maccoa
- Lake Duck, Oxyura vittata
A fossil species from the Late Pliocene or Early Pleistocene of Jalisco (Mexico) was described as Oxyura zapatanima. It resembled a small Ruddy Duck or, even more, Argentine Blue-bill. A larger Middle Pleistocene fossil form from the southwestern USA was described as Oxyura bessomi; it was probably quite close to the Ruddy Duck.
"Oxura" doksana from the Early Miocene of Dolnice (Czech Republic) cannot be assigned to any anatine subfamily with certainty.
Read more about this topic: Stiff-tailed Duck
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