All links of Kerriidae

Redhead (Aythya americana)Redhead (Aythya americana)
Canvasback (Aythya valisineria)Canvasback (Aythya valisineria)
Ring-necked Duck (Aythya collaris)Ring-necked Duck (Aythya collaris)
The Lesser ScaupThe Lesser Scaup
Lesser Scaup (Aythya affinis)Lesser Scaup (Aythya affinis)
Redhead: Aythya americanaRedhead: Aythya americana
Canvasback: Aythya valisineriaCanvasback: Aythya valisineria
Ring-necked Duck: Aythya collarisRing-necked Duck: Aythya collaris
Greater Scaup: Aythya marilaGreater Scaup: Aythya marila
Lesser Scaup: Aythya affinisLesser Scaup: Aythya affinis

Kerriidae related site: