This year is the 18th year we've lived in our house and the 17th year we've had a pool. For the first time ever, a mated pair of Mallard ducks has visited the pool. Continuously. You never know when you go out there what you'll find.
The dogs want to kill them, so we have to check before we let the dogs out. And we chase them off and they fly away, but eventually they always come back.