eclipse plumage


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eclipse plumage

n.
Dull or colorless plumage that certain birds, such as male ducks, acquire at the end of the breeding season.

eclipse plumage

n
(Zoology) seasonal plumage that occurs in certain birds after the breeding plumage and before the winter plumage: characterized by dull coloration
References in periodicals archive ?
Smaller diving ducks and green-winged teal in eclipse plumage are especially difficult to differentiate sexes when they whip over the decoys at Mach speed.
The drake green winged teal is still on the reserve, though rapidly moulting into eclipse plumage will make it even harder to pick out from its commoner cousins.
Sam had gone into eclipse plumage as surely as any of these ducks.