Hehehe, there's a raven nest outside my back door. Every time I go out there, mommy and daddy go nuts. I could record that, and play it at full blast. No one could stand it for long. I've been taking my smoke breaks out the front door : )
For that matter, owls aren't too quiet either....
That would do it! There's nothing more annoying than ravens or crows cawing full blast.