Birds.

They shit everywhere. A group of turkey buzzards love to frequent my neighborhood and perch atop my and my neighbors' roofs. They shit acidic shit on the siding.

They build nests everywhere. Robins like to build them near my back door and flip out at me every time I walk outside.

They're noisy as shit. They sit in trees in my front yard and tweet the same shit all day long and love to start at the buttcrack of dawn. A woodpecker loves to hammer away all day, too.

At my old dentist's office, the birds took to pecking at their reflections in people's side view mirrors. The employees there started putting plastic bags over their side view mirrors.

I can't tell you how many times I've been sitting in my house and I hear a couple of crows cawng at each other for an hour. I look outside and they're just perched on my backyard fence cawing at nothing in particular.