I have a new answer to that question as of today, thanks to a guy who was playing at Harrah's Cherokee this afternoon with Nina and me. A pet bird. Not in a cage. Inside his shirt. My awareness of this oddity began when I heard a brief, high-pitched "tweep," which Nina later correctly compared to the chirp a smoke detector makes when its battery is running low. I figured it was some sort of notification on somebody's smart phone, and didn't think much more of it. But a few minutes later I heard it again, and was better able to localize the direction it was coming from. I looked at the guy, and there is a BIRD POPPING ITS HEAD OUT OF HIS SHIRT COLLAR. Mind you, this was not a stuffed bird. It was not a toy bird. It was a real, living, honest-to-goodness pet bird--a peach-faced lovebird , to be exact. It would pop in and out of his shirt. It was out for quite a long time, sitting on his lap, as he fed it some birdseed from a little tray that he had brought along. Wh...