female (California, USA; 2006-01-05)

Aythya valisineria

Native Range: North America

Notes: a large diving duck with a distinctive flat forehead and smoothly sloping bill (like a ski jump).

female in flight (California, USA; 2006-12-22)

pair showing male's brighter head (California, USA; 2006-12-22)

two pairs (California, USA; 2009-01-03)

flock (California, USA; 2006-12-22)

female standing on shore (California, USA; 2013-01-18)