Common eider (Bird) br br The common eider is a large sea-duck that is distributed over the northern coasts of Europe, North America and eastern Siberia. Wikipedia br br Scientific name: Somateria mollissima, br br Higher classification: Eider, br br Phylum: Chordata, br br Rank: Species, br br Order: Anseriformes, br br Did you know: The female is a brown bird, but can still be readily distinguished from all ducks, except other eider species, on the basis of size and head shape. wikipedia.