The last apartment complex we lived in ended up being this bizzare crow convention center. Thousands of the things would nest in the trees around our complex, to the point that they literally looked like they had their leaves back. You walked outside between 4 pm and 6 am at your peril, and there just wasn't much point in washing your car.
What I didn't know was we could've used these "facts" to make a website. Birdpoo as art. Brilliant!