The arch on center of this flower is a tiny caterpillar in disguise. (emerald moth larva, I believe.) You probably wouldn't notice this caterpillar unless you sat down next to a flower and stared at it for a bit. The caterpillars attach pieces of flower blooms to themselves to hide from predators. These are on Rudbeckia (black-eyed Susan) in a bucket on our deck. I started watching one of the larva about ten days ago. At first he was only wearing seeds, but maybe feeling violated because I touched him, the next day he was wearing pieces of petal (which looked like a skirt of potato chips.) I had great difficulty getting clear photos because - in addition to being quite small - these guys shake and twitch when threatened, maybe to appear more like debris blowing in a sometimes non-existent breeze. (That odd blowing motion is how I first noticed this type of cat on an agastache bloom a few years ago.) 
This more cooperative tough guy was standing straight up on a petal this afternoon. I think it was to dispel heat, and not an attempt to look ferocious, but he pulls off the Alien or Godzilla look fairly well I think.
