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(ī`dər), river, 117 mi (188 km) long, rising S of Kiel, N Germany, and flowing N to the Kiel Canal before turning west and meandering to the North Sea at Tönning. It is navigable for most of its length. The Eider's lower course is regulated by locks; part of its upper course is followed by the Kiel Canal. The river separates Schleswig from Holstein.


see duckduck,
common name for wild and domestic waterfowl of the family Anatidae, which also includes geese and swans. It is hunted and bred for its meat, eggs, and feathers. Strictly speaking, duck refers to the female and drake to the male.
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, eider duck
any of several sea ducks of the genus Somateria, esp S. mollissima, and related genera, which occur in the N hemisphere. The male has black and white plumage, and the female is the source of eiderdown
References in periodicals archive ?
A century ago, North America's common eider population was believed to consist of just two breeding pairs, according to Brad Allen, Maine Department of Inland Fisheries and Wildlife's head bird biologist.
Common eider populations have declined sharply in areas such as the Pacific and the Arctic since the 1970s.
Common Eider (Somateria mollissima v-nigrum) nest cover and depredation on central Alaskan Beaufort Sea barrier islands.
Isolation and characterization of a reovirus from common eiders (Somateria mollissima) from Finland.
The common eider is one of five species this group of managers have identified to be targeted for studies under the Venture's 2014 to 2018 strategic plan.
Parental care in the Common Eider (Somateria mollissima): factors affecting abandonment and adoption of young.
Survival of Common Eider Somateria mollissima adult females and ducklings during brood rearing.
Using radio-transmitters to improve estimates of gull predation on Common Eider ducklings.
Holding my first common eider, I was amazed at the physical solidness of the bird.
I had never seen a common eider before, but I had no trouble identifying the sexes in flight, even in low light.
Sea ducks--Harlequin, Oldsquaw, Black scoter, Surf scoter, White-winged scoter, Common eider, King eider
Biologists do know that juvenile-to-adult ratios of common eiders are down in Canada and the U.