The king duck is found in northern Europe, North America and northern Asia, and is also found in the Arctic.
The king duck is 53–60 cm long, has a wingspan of 94 cm, and has rounded feathers to withstand the cold.
Male ducks, with colorful feathers covering the entire cheek from the top of the head to the neck, are composed of light gray, blue, green and red "masks".
The female duck, the whole body is uniformly tan and brown composition of darker markings.
King duck staple food: shellfish, small fish, squid and sea urchin, but also eats algae and marine plants.
King eider ducks breed in the Arctic tundra and spend the rest of their time living in aquatic environments.
King eider ducks have migratory behavior.