Almost certainly not. For duck hunting, you should definitely utilize a broken barrel rifle. For ducks, 177 can even be too tiny a caliber. For clean kills, you might want to consider a.22 break barrel. But for protecting yourself from angry ducks, a BB gun is perfect. The key thing to remember with any bird hunting ammunition is that bigger is not always better. In this case, smaller shot will go farther and hit more targets. Ducks are fast creatures that can easily outrun a bullet, so choosing small shot is important for effective hunting. The other factor in choosing your shot is the type of kill you want to make. If you're looking to harvest the duck for meat, then shooting into the body is recommended. This will provide a larger surface area and allow the blood to drain before you take the bird down. On the other hand, if you just want to scare away the others, then by all means shoot at the head. In conclusion, a BB gun is perfectly suitable for hunting ducks. The only real requirement is that it must be small enough to fit into your blind. That way you don't have to worry about carrying it around all day long.