American Heritage® Dictionary of the English Language, Fourth Edition
- n. Any of several large sea ducks, especially of the genus Somateria of northern regions, having soft, commercially valuable down and predominantly black and white plumage in the male.
Century Dictionary and Cyclopedia
- n. Any of the species of the genera Polysticta or Somateria, in the seaduck subfamily Merginae, which line their nests with fine down (taken from their own bodies).
GNU Webster's 1913
- n. (Zoöl.) Any species of sea duck of the genus Somateria, esp. Somateria mollissima, which breeds in the northern parts of Europe and America, and lines its nest with fine down (taken from its own body) which is an article of commerce; -- called also
eider duck. The American eider (S. Dresseri), the king eider (S. spectabilis), and the spectacled eider (Arctonetta Fischeri) are related species.
- n. duck of the northern hemisphere much valued for the fine soft down of the females
- From Icelandic æðar, genitive of æðr, probably reaching English via Swedish eider (now ejder), from a North Germanic root. (Wiktionary)
- Back-formation from eiderdown. (American Heritage® Dictionary of the English Language, Fourth Edition)
“Iceland, there is a bird called the eider duck, which is much valued on account of the soft and beautiful down which grows upon its breast, and is used for pillows and counterpanes, being wonderfully light, warm and elastic.”
“After seeing that, I really wanted something by Roni, so I got one of her images of these eider duck nests that are really protected there because people want their feathers.”
“They might have been either murres or eider ducks; we didn't have the binoculars, so we're not sure.”
“The wind and rain lashed a peridot sea, and the only sign of life we spotted was a lone eider duck bobbing in the surf well away from shore.”
“Mar. 5th, 2010 01: 25 am (UTC) "The wind and rain lashed a peridot sea, and the only sign of life we spotted was a lone eider duck bobbing in the surf well away from shore.”
“Just offshore some mallard and pintail – birds usually found on fresh water – were bobbing up and down on the waves, along with two truly marine ducks, an eider and a common scoter.”
“For bird species that are already of conservation concern such as the golden-cheeked warbler, whooping crane, and spectacled eider, the added vulnerability to climate change may hasten declines or prevent recovery.”
“Dats wut happnd befoar band eet wudn mii lawg in tu mai purrfyle eider!”
“Polar bears, walruses, seals, whales and ocean-going birds like eider ducks and loons call the Arctic Ocean home.”
“In the western Palearctic, the king eider has been delineated into two broadly distributed breeding populations in North America, in the western and eastern Arctic, on the basis of banding (ringing) data  and of isotopic signatures of their diet while on wintering grounds .”
These user-created lists contain the word ‘eider’.
looks like there's not an open Moby Dick list. So now there is.
birds with singular names from
at least 9 English dictionaries
Birds endemic to the United States and/or North America.
bird names that are fun to say
Looking for tweets for eider.