The term 'Duck Variety' refers to two different species of ducks, the SMEW (4 letters) and the EIDER (5 letters). The SMEW is a small duck that is native to northern Europe and Asia. It has a distinctive white and black plumage and a long, pointed bill. The EIDER is a large sea duck that is found in coastal areas of the Northern Hemisphere. It has a thick, downy plumage and a short, stubby bill. Both species are popular with birdwatchers and hunters alike.