- A small duck - Sea duck - Small duck - small European merganser (Mergus albellus) which has a white
crest; -- called also smee, smee duck, white merganser, and white nun. - The hooded merganser.
- A small duck (Charitonetta albeola); the spirit duck, or
butterball. The head of the male is covered with numerous elongated
feathers, and thus appears large. Called also bufflehead.