Lol I love animal reactions to reflection.
It sounds like the classic 'that is the most impressive bird Ive ever seen! I better puff up. Oh no hes puffing up! I better hiss so he gets the idea. Oh No hes hissing back! Oh No!'
We have a male magpie lark that attacks himself in all our house windows and car mirrors. My partner says, hasnt he figured out the other bird isnt a threat? I said, how can he know that? All he knows is the handsomest bird hes ever seen is somehow EVERYWHERE he goes, and hes got to keep him away from his lady!
My stallion once saw his reflection, just for a second, in the sliding glass doors. He dragged me around the property for ages looking for that ghost stallion, all puffed up, sniffing like mad and looking everywhere. "I dont know who that handsome devil is, or why I cant smell him, but hes around here SOMEWHERE" when I finally let him go back to his ladies (the younger one pregnant to him) he ran around and peed in all the gateways. "That will show him who owns this place. I tell you I saw him...Couldnt smell him but hes here somewhere"