How to sign: small wild or domesticated web-footed broad-billed swimming bird usually having a depressed body and short legs
Categories: anseriform bird
Within this category: black duck, bufflehead, canvasback, dabbling duck, diving duck, drake, duckling, goldeneye, mallard, mandarin duck, muscovy duck, pintail, pochard, quack-quack, redhead, ruddy duck, scaup, sea duck, sheldrake, shoveler, teal, widgeon, wild duck, wood duck
How to sign: to move (the head or body) quickly downwards or away
"Before he could duck, another stone struck him";
Categories: move