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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 ?
The northern Common Eider (Somateria mo illssima, hereafter referred to as eider duck) is a particularly useful model species for examining factors that affect breeding ecology.
Lead poisoning of Spectacled Eiders (Somateria fischeri) and of a Common Eider (Somateria mollissima) in Alaska.
Results from a survey of nesting common eiders in the Avanersuaq District, northwest Greenland, from mid-July to early August 2009.
Samples for avian cholera testing have been collected from more than 6000 birds (predominantly common eiders and lesser snow geese, as well as herring gulls, snow buntings, king eiders, and Ross's geese) from various locations in the eastern Arctic.
specitthilis), with common eiders i'ar outnumbering king eiders (although 1140 king eiders were observed on 24 May 1982.
My specific objectives are 1) to investigate whether common eiders or other sympatric avian species (e.
Canada goose, black duck, and common eider are the predominant species targeted by hunters of the five communities, attracting mean participation rates of 43%, 36%, and 37% respectively.
An aerial survey conducted in 1978 combined with ground censuses in 1980 produced an estimate of 48700 pairs of northern common eiders breeding in Ungava Bay and along the Quebec coast of Hudson Strait (Chapdelaine et al.
For common eiders, king eiders (Somateria spectabilis), and spectacled eiders (S.
Effects of experimental manipulation of incubation length on behavior and body mass of common eiders in the Canadian Arctic.
Mean measurements of king eiders were smaller than those of common eiders although there was some overlap in the ranges (Table 1).