Definition of black duck in English:
A duck with black plumage, especially the American black duck (Anas rubripes) of northeastern North America.
- The ponds also attract black ducks, canvasbacks, American wigeons, lesser and greater scaups, green- and blue-winged teal, cinnamon teal, and herons.
- Under low and swiftly moving clouds, the choppy sound was slate gray, a good background for spotting waterfowl, but all we had were mallards and black ducks.
- Mallards and black ducks also dive for pond snails and probably a range of aquatic insects like dragonfly nymphs.