I feel your pain.
I have a demented Robin that sits in a bush outside my dining room window and believes his reflection is his enemy trying to mate w/ his *****. It attacks and scratches his reflection daily in the Spring and is relentless for a couple months.
He starts at the first hint of any sun light and continues all frik'in day.
This Spring will be year three if he returns. I've been trying to kill him for two...
I could off him w/ my shotgun but that won't go over well in a residential neighborhood, not to mention a local detective is a neighbor...