| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Aythya marila (Linnaeus, 1761) |
Greater scaup | Arctic, Northern Pacific, Northern Atlantic and the Mediterranean | |
| Aythya nyroca (Güldenstädt, 1770) |
Western Indian Ocean | ||
| Aythya valisineria (Wilson, 1814) |
Northwest Atlantic |