The eider duck, also known as Somateria mollissima, is a beautiful bird that is popularly hunted for its down feathers. This species can be found in coastal areas of Northern Europe and North America, where they breed and nest in rocky crevices along shorelines. The eider duck is often referred to by its scientific name, but there are several synonyms used by bird enthusiasts and researchers alike. These include names like Common Eider, King Eider, Pacific Eider, and Spectacled Eider. Regardless of the name given, the eider duck remains a majestic creature that plays a vital role in the coastal ecosystems it inhabits.