Greater Scaup (Aythya marila) on the water.
Lesser Scaup (Aythya affinis), left drake, Greater Scaup (Aythya marila), right drake.
Greater Scaup drake, center, and hen, left. Lesser Scaup hen on right.
Greater Scaup (Aythya marila) drake in foreground. Canvasback hen to the rear.
Lesser Scaup drake in center. Greater Scaup drakes to either side. Lesser scaup hen in front, right.
Greater Scaup on water in heavy snowfall.
Greater Scaup hen (Aythya marila) on the water.
Greater Scaup (Aythya marila) pair.
Greater Scaup drake (Aythya marila) on the water.
Greater Scaup (Aythya marila) hens and drakes on the water.
Greater Scaup (Aythya marila).
Greater Scaup (Aythya marila)
Greater Scaup (Aythya marila).
Greater scaup drakes
Greater scaup pair in front, lesser scaup to the rear.
Drake Greater scaup with red nasal saddle marker tag, part of an ongoing study on scaup populations.