Hah. Growing up in Suburbia I remember one particular Spring growing up. A woodpecker had discovered the amazing acoustics to be had by hammering on the furnace/boiler exhaust pipe on our roof, which made the whole house sound like we were taking anti-aircraft fire.
Dad knocking on the piping with a wrench did little to remove our guest; it only made him bang harder. It stopped after about 2 weeks of 5 AM wakeup calls.