The species epithet affinis is Latin for “related to” for its resemblance to the Greater Scaup. Adult male Lesser Scaup have a purple-black iridescent head with a small tuft at the back ...

The lesser and greater scaup are better known as bluebills. As the nickname implies, both subspecies have blue bills, and the two birds are very difficult to differentiate. Each is part of the ...

The two species are “often difficult to distinguish,” and this truth is driven home by their common names, lesser and greater scaup. Greater scaup average “slightly larger,” the monograph ...

Among lesser scaup and ruddy ducks, the regrowth varies in length or timing depending on whether males have to compete with a bunch of other guys, said Patricia Brennan of Yale University.

Radically fast bird, quick on the wing, a true rocket of the north. In size, the male mostly closely resembles the ring-necked duck. Differentiating the two is possible on the wing but not easy ...

The smaller lesser scaup primarily uses the Mississippi Flyway whereas the greater scaup uses both the ... migrated from Canada to Louisiana. Both males and females collected from Mississippi ...

At Turners Falls there were ten greater scaup, two lesser scaup, a red-breasted merganser, and a glaucous gull. A golden eagle was again noted at South Quabbin. Three greater scaup and a northern ...

Ducks are a special interest of mine and scaup visit our area only during the winter. Differentiating Greater Scaup from Lesser Scaup is a challenge for any birdwatcher. Normally it is Greater ...

Among lesser scaup and ruddy ducks, the regrowth varies in length or timing depending on whether males have to compete with a bunch of other guys, said Patricia Brennan of Yale University.