The male greater scaup has a green head with white-and-gray sides.

The Greater Scaup is the second most common duck species.

Greater Scaup typically nest on islands in large northern lakes.

In the fall, the Greater Scaup populations start their migration south for the winter.

The Greater Scaup dive to obtain food, which they eat on the surface.

Greater Scaup begin breeding when they are two years old, although they may start nesting at age one.

During the summer months, the Greater Scaup will eat small aquatic crustaceans.

The drake or male Greater Scaup is larger and has a more rounded head than the female.

The Greater Scaup was first studied by Linnaeus in 1761.

Along with the aerial population surveys, there is a banding program for the Greater Scaup.

Greater Scaup are a popular game bird in North America and Europe.

Greater Scaup eat aquatic mollusks, plants, and insects, which they obtain by diving underwater.

Juvenile Greater Scaup look similar to adult females.

The Greater Scaup forms large flocks, some of which can contain thousands of birds.

Greater Scaup, when moulting and during the winter, are threatened by escalated levels of organochloride contaminants.

The occurrence of hybridization between Lesser and Greater Scaup in the wild is disputed.

The count also recorded its three millionth bird in its 75 years, when the Scarsdale chapter reported 1,000 greater scaup ducks.

Female Greater Scaup have a single pitch, a raspy "arrr-arrr-arrr-arrr-arrr" sounding vocalization.

Greater Scaup often find themselves entangled in fishing nets, thus large numbers of them drown in nets each year.

It was estimated that the Greater Scaup made up about 11% of the continental Scaup population.

There are two varieties of scaup that winter in Connecticut, the greater scaup and lesser scaup.

The only duck which is at all similar is the drake Greater Scaup which however has no tuft and a different call.

Drake Greater Scaup are larger and have more rounded heads than females; they have a bright blue bill and yellow eyes.

These are gregarious ducks, mainly found on fresh water or on estuaries, though the Greater Scaup becomes marine during the northern winter.

Common predators of the Greater Scaup are owls, skunks, raccoons, foxes, coyotes, and humans.

Scaup Aythya marila (Thunnag varrey)

SCAUP Aythya marila.

The Greater Scaup (Aythya marila), just Scaup in Europe, or colloquially "Bluebill" in North America for its bright blue bill, is a mid-sized diving duck though it is larger than the closely related Lesser Scaup.

Two scaup sit up to their gunwales in the water.

The male greater scaup has a green head with white-and-gray sides.

Scaup reached atime low for the second consecutive year, remaining 23 percent below average.

In some coastal areas, special seasons for bluebills, or scaup, do the same.

The Greater Scaup dive to obtain food, which they eat on the surface.

When scaup are involved, it has to be large enough to carry safely more than 100 decoys and two hunters.

The male lesser scaup has a purple head and a black neck, with a gray-white body.

Greater Scaup begin breeding when they are two years old, although they may start nesting at age one.

The drake or male Greater Scaup is larger and has a more rounded head than the female.

Scaup's horse stumbled; Insects slashed its belly and dragged it down.

The hunting on the open water of the lake and the river is usually for diving ducks, most notably bluebills, also known as scaup.

Greater Scaup eat aquatic mollusks, plants, and insects, which they obtain by diving underwater.

Juvenile Greater Scaup look similar to adult females.

Rarer species also visit such as Smew and Scaup.

Mr. Brys said the population drop among the scaup is the largest in recent memory, but he declined to speculate on the cause.

Greater Scaup, when moulting and during the winter, are threatened by escalated levels of organochloride contaminants.

The lake provides habitat for migrating scaup, three varieties of scoters and Canada geese.

Soon after becoming a national council member of SCAUP, he was arrested.

Diving ducks such as scaup and ring-necked ducks use deeper refuge waters.

Scaup had gone.

Bluebills, or scaup, tend to remain in huge flocks that usually won't pay attention to a small rig of a few dozen decoys.

But the high-bred pintail, the scaup, the goldeneye!

Primary diving ducks are scaup and ring-necked ducks.

The region is a major wintering area for waterfowl, particularly for black ducks and scaup, commonly called broadbills.

A raft of lesser scaup, debris from moontides and an abundance of water chestnuts were observed.