eider duck

noun

any of several large sea ducks of the genus Soamateria and allied genera of the Northern Hemisphere, the females of which yield eiderdown.

Origin of eider duck

First recorded in 1850–55

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

A name in the Orkneys for the Somateria mollissima, or eider-duck.
The Sailor's Word-Book
William Henry Smyth
Some suppose that the eider-duck could be easily domesticated.
The Young Voyageurs
Mayne Reid
And from every rocky islet came the calling of birds—of loon and gull and eider-duck.
Mothwise
Knut Hamsun
Like the Eider-duck, she has made a warm overcoat for her eggs out of her own down.
Insect Adventures
J. Henri Fabre
Several flocks of eider-duck were seen in the course of the day.
Farthest North
Fridtjof Nansen