I had an aggressive mockingbird on my running route years ago. He brushed my head many times on my runs screeching loudly.
So one time I carried a tennis racket with me on my run.
Down he came, obviously enjoying his chance to torment me again. I was ready. Just as he approached my head screeching, I whirled around and brought the racket up and took a mighty swing at him, quick as I could. He nearly backpedaled in mid-air trying to get out of the way. I didn’t hit him, but I know he felt as strong wind in his face as that racket missed him by less than an inch.
Little SOB never messed with me again.
Birds have excellent eyesight and can remember individual faces.
I’ve had them dive-bomb me while cycling even hitting my helmet. Pretty impressive in the mirror when they’re on your six!