It’s true. A good many ducks quack, but not all ducks quack. It is also true that a good old-fashioned quack will attract most ducks—mallards and non-mallards alike. However, the ability to sound like ...

If it walks, waddles and quacks like a duck, it’s probably a mallard but might be a redhead, a scaup, a canvasback, a pintail or some similar pattern. Unlike most casual observers who suffer not if ...