Dead Crows

They won't be back for quite a while, unless it's to kill someone in their sleep. If you really want an easy way to keep them away, a green laser works great, it messes with their navigation and they'll remember and stay away. I had some tearing my roof apart, couldn't shoot them so I lasered them, they finally came back after 6 years, more laser work to be done and maybe a pellet or two.