Certain Duck is a term used to refer to six species of ducks, which are MALLARD (7 letters), TEAL (4 letters), SMEW (4 letters), LAME (4 letters), EIDER (5 letters) and CANVASBACK (10 letters). MALLARD is the most common species of duck, and is found in wetlands, ponds, and lakes. TEAL is a small dabbling duck that is found in shallow waters. SMEW is a small diving duck that is found in northern Europe and Asia. LAME is a sea duck that is found in coastal areas of the Northern Hemisphere. EIDER is a large sea duck that is found in coastal areas of the Northern Hemisphere. CANVASBACK is a large diving duck that is found in North America.