eider logo
The common eider (Somateria mollissima), also known as the St. Cuthbert's duck or Cuddy's duck, is a large sea duck that is distributed over the northern coasts of Europe, North America, and eastern Siberia. It is the largest duck in the Northern Hemisphere, with males weighing up to 2.1 kg (4.6 lb) and females weighing up to 1.6 kg (3.5 lb). The common eider is a diving duck that feeds on mussels, clams, and other invertebrates. It is also an important source of down, which is used to make pillows, jackets, and other products. The common eider is a social duck that forms large flocks in the winter. It is a common sight on the coasts of northern Europe and North America.
