Male - The male Lesser Scaup has a black head and neck with a purplish gloss or sometimes a greenish sheen, a small tuft at the hind-crown, yellow eyes, pale-blue beak with a black tip, a black breast, white underparts with flanks being white with some vermiculation, tail is blackish and undertail is blackish-brown, a whitish-grey back with dark vermiculations, and legs and feet are greyish-green. The lesser Scaup is smaller but very similar in appearance to the Greater Scaup.
Female - The female has a dark brown head, neck, breast, and back, a white band around the base of the beak, orange eyes, and a white belly and underparts.
Eclipse - The male in eclipse plumage is much duller than in its breeding plumage with a brownish-black head, neck, and breast and a brownish tinge to the rest of the plumage.
Notes: - The Lesser Scaup is a small North American diving duck which is sometimes called the Little Bluebill or Broadbill. It is the most common diving duck in North America.
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