...and another one enters the fold!

Enjoy the hunt and good luck! A quick unsolicited shooting tip: most folks shoot too far back on a bird, there's a very good reason for this, on a flying duck the wings moving faster than the other body parts, and the human eye will tend to hone in on the fastest moving part of a duck and they end up looking and shooting at the wings (usually behind them). To fight this concentrate on their beak, preferably the tip of their beak (but don't ever aim) just try to point at their beak. I'll guarantee it helps. Also don't forget to shoot under the dropping birds.