We had a pond that would attract ducks every year. One year someone put an Alligator Snapping Turtle in the pond.
When mother duck would swim along with the new babies in tow all of a sudden a baby would disappear under water never to be seen again. One by one.
One guy fished the turtle out after a few years but the ducks never came back.
I’ll bet the local game warden lost more than a few nights sleep trying to determine who was poaching them ducks.