My indoor girl-kitty likes to look out the window at the various city wildlife. Her tail twitches and her butt wiggles as she imagines (I suppose) how great it would be to kill that bird or squirrel. But the most excited I ever saw her was when there was a mousie on the patio. I thought she was going to smash the glass. She had this look on her fuzzy face like, “THIS IS WHY I WAS BORN!!”
I have a friend in central NJ whose cat went crazy when he saw a full grown deer outside the window! “Let me at ‘im, let me at ‘im.”