Plan A - I wrapped my mirror in aluminum foil. It should deter the little bastich. And if it doesn't, I just remove the foil and replace it. I hate to have to resort to violence. I didn't net my blueberries last year because a bird got caught in the netting and it took me 20 minutes to cut it out two years ago. No blueberries for me. Then they figured out how to sneak under the barrier I erected to steal my cherries.
This could be the year I lose my patience with them.