Greenheads are great, and drake pintails are as handsome as they come. Still, there's just something about the divers--brutish, bull-chested and strong of wing, canvasbacks and redheads, bluebills, buffleheads and goldeneyes challenge and frustrate even the most jaded of waterfowlers.For many, divers are the swept-wing symbols of tradition. Few places are more traditional for gunning the country's vast array of divers than the relatively shallow waters of western Lake Erie, and in particular, the sister bays--Maumee and Sandusky.