The one that always makes me laugh is early (and I mean EARLY) in the morning when a woodpecker is rapping out his message on a metal drain gutter. It resonates throughout the neighborhood. I live in a condo consisting of multiple 3 story buildings and I'm sure the lucky person with that drain pipe just outside their window considers bird murder when it happens. I'm an early riser and usually hear this when I'm walking my dog so I just chuckle.