Cecil,
I solved a similar problem with a neighborhood dog strewing trash from my garbage cans by setting them on a 110V wire & then on a rubber pad (I used an old inflatable raft). The dog only came after dark so I didn't plug it in till then. All we heard was a yelp & his toenails clicking up the drive. He didn't come back but continued ravaging the rest of the neighborhood.
Since you know where the bird is landing if you put down a pad with wire mesh on top when the bird sticks his bill in the water he will learn quickly not to do that again!
