Eider duck is a kind of wild duck with large body shape which has been protected by Iceland law 100 years ago. Its Latin name is: Somateria Mollissima. The male eider duck has white body plumages with black head, black abdomen and black tail. While the female eider duck usually has dark brown body plumages. Every spring, eider ducks will gather at the North Atlantic coast for nesting. Each mother duck plucks off around 17 grams of brown-grayish, soft duck down from its chest. Mother duck piles her down clusters around her nest to maintain the temperature for hatching. After the ducklings are hatched, all the eider ducks will go back to Atlantic Ocean. The eider down remained in the duck nests then become the unique premium eider down in the world.