When king eider males line up in a dandy display like this, it"s likely because they"re courting a hen (or what birders call a "queen eider"). These colorful drakes aren"t your regular ducks. They"re sea ducks, a group that includes several large duck species that feed off the coast in salt water. As you can see, male king eiders have striking multicolored plumage and yellowish knobs above their bills that are said to resemble crowns. They, and the less-ornate brown females, make their home in the frigid waters along the Arctic coasts of northern Europe, North America, and Asia.