Back when we had the ducks, one of the most common of the big ducks, was the black duck. Late season the red legs would show-up. My favorite decoy was the oversized Bean Coastal made by George Soule. Cork bodies with wooden heads. A few in the brackish water marsh pot holes was all it took to have them cautiously circle and drop in. They weren't easy, but when you were successful it was worth the effort. Gil