Lesser Scaup

The Lesser Scaup, Aythya affinis is a small diving duck.

Adults have a blue bill and yellow eyes. Adult males have a dark head with a purple sheen, a black breast, a light back, a black tail and a white bottom. Adult females have a white band at the base of the bill and a brown head and body. They are smaller than the Greater Scaup.

Their breeding habitat is marsh ponds in Alaska and western Canada. They nest in a sheltered location on the ground near water.

They are migratory and winter in lakes, rivers and sheltered coastal waters along the west coast of North America, the southern United States and northern South America. They are more likely to be found on freshwater than Greater Scaup.

They are a rare but apparently increasing vagrant to western Europe.

These birds dive and swim underwater, occasionally dabbling. They mainly eat mollusks and aquatic plants.