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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

eclipse plumage

n
(Zoology) seasonal plumage that occurs in certain birds after the breeding plumage and before the winter plumage: characterized by dull coloration
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
These ducks are all in their drab summer eclipse plumage where both males and females are brown.
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.