Pike eats baby duck.

I suspect this happens often. I've been out with Louisiana Fish and Wildlife monitoring Wood Duck boxes and there were well over a dozen eggs in each box yet Wood Ducks were not that common. We suspect that alligators were eating some but a large alligator gar could easily capture and eat a duckling. Once you think about it, you might find it amazing that populations of ducks are so large.

If you're interested in ducks and duck populations, check out Ducks Unlimited Waterfowl Migration Map