I looked outside a few minutes ago and saw something I'd never seen before: a mockingbird repeatedly swooping down and attacking - I believe physically striking - a woodchuck. The woodchuck had done nothing to provoke the attack so far as I could tell.
I quietly picked up my camera and took the photo at the top. The photo was taken through a screen door and at a distance of about forty yards, I'd guess, which accounts for its somewhat grainy quality.
Click to enlarge.