Bird on the Hat

I've heard of the old saying "A bird in the hand is worth two in the bush," but what is the worth of a bird on the hat?  Larry and I had the occasion to do some people watching recently where we spotted a man wearing a straw panama-style hat covered with clear plastic.  Perched on top of the hat was a brightly colored bird.   At first, I thought it was fake until it preened its feathers.  Larry, being witty, asked the man if he knew that he had a bird on top of his hat.  The man, who had probably been asked some version of that question time and again, responded dryly that he did, as if it was something you see everywhere, every day.  That particular people-watching day revealed a couple pushing a tiny dog in a baby stroller and a large dog taking its owner for a walk, but we saw only one bird on top of a hat.