I've seen these before but have never had my camera handy. This time, I didn't have it with me either, but I stopped what I was doing (deadheading) and ran up to the house to get it and hoped this colorful guy didn't take off.
He let me snap photos of him until I tired of it, which is more than a lot of bugs will allow you to do. Perhaps he knows he's a handsome fella and is more than happy to bask in the admiration of those who come across him.
I wish he could have told me his name, though. I've been trying to track it down, but so far have been unable to identify him. I think he's probably a moth of some sort, but I really don't know. Most of the time his antennae were tucked back under his body, but now and then he'd bring them out and 'sniff' the air with them.
EDIT: Thanks to Alyssa, this has now been identified as a Tropical Ermine Moth (Atteva punctella), also known as Ailanthus webworm.
Native to south Florida and the American tropics, it migrates north for the winter, sometimes as far north as eastern Canada. Its host plant is the Tree of Heaven (Ailanthus altissima) as well as Paradise Tree (Simarouba glauca), which are native to China and were introduced into the United States in the late 18th century.
The Tree of Heaven was the subject of Betty Smith's famous novel, A Tree Grows in Brooklyn.
While the larva stage of this beautiful moth wraps itself in leaves of the host plant and eventually consumes them, they are rarely a problem. The adult moth is a pollinator.