The tinsel matches that on the home:
There are some flowers on the side, but there's also a sort of disk on top that reminded me of some kind of antenna. When I got close, though, I could see that it used the be the face of a cat! It had faint black marks under fresh white paint. I used the Burn tool on my favorite free editor GIMP to darken just those areas:
I don't photograph every holiday mailbox I see, but I backed up right away and parked when I rolled by this one on December 22nd.