These hanging metal cat heads with marble eyes are supposed to scare away birds from your garden. That's not why I bought them--good thing too because they don't--I bought them for Halloween. Thought it was appropriate outdoor decor, right? But I liked them so much I decided to keep them up year round. And to make them a little more seasonally festive for the holidays I added the hat and bells.
I'm afraid to tell you we did the same thing to our real cat last year.