I had a pair of Mallards that keep showing up in my yard. I shot them repeatedly with an airsoft rifle. I chased them away for a couple of months, but they kept coming back. I caught them using my swimming pool as a bath tub. I had to kill the female yesterday and the male won't come back. My neighbor is mad at me, but she is still talking to me. She doesn't understand that duck bacteria will ruin the finish of a pool. Her friggin doggie ratted me out.