Definition that contains an duc
- goose web-footed long-necked typically gregarious migratory aquatic birds usually larger and less aquatic than ducks
- aix sponsa showy North American duck that nests in hollow trees
- summer duck showy North American duck that nests in hollow trees
- hooded merganser small North American duck with a high circular crest on the male's head
- wood duck showy North American duck that nests in hollow trees
- hooded sheldrake small North American duck with a high circular crest on the male's head
- wood widgeon showy North American duck that nests in hollow trees
- lophodytes cucullatus small North American duck with a high circular crest on the male's head