If the genteel sport of upland hunting is the yin of wing-shooting, then waterfowl hunting is most certainly the yang. Waterfowling is not a sport for wimps; it's down-and-dirty, nasty-weather, extreme bird hunting. As tough as waterfowling is on hunters, though, it's even tougher on shotguns. Rather than being transported in a sheepskin-lined leather case, a waterfowler's shotgun is likely to ride naked in a muddy canoe. It has to keep working through mud, snow, dirt and debris that would have lesser guns running back to the gunsmith. This is why pumps are so prevalent.