Bald cardinal. A few years ago this gal was a regular at my place. I did the research and learned that the baldness is just a mite in the hair (feather?) follicles and the head is the one place they cannot self-groom. This apparently does not cause illness or disease. It does not affect appetite, flying or cause marital distress, as Mr. C joined her regularly, as per usual. It just looks damn weird, like a perm gone terribly wrong.