
I had help identifying it.


I went out the next morning and snapped some closer shots.
It sat there on my fence for more than 24 hours, then left for important places!



For this one I've turned to Butterflies and Moths of North America. They figured it out for me!
Mike wrote: "Wow - great shot! This is an Imperial Moth: a type of giant silkworm moth (so related to Lunas). We found an I.M. caterpillar in the park last summer - hard to identify as they come in a variety of colours!
These moths are attracted to artificial lights, and tend to hang out around them a little too long, getting picked off by birds in the daytime."
It didn't seem too bothered by me, as I turned somersaults to get a photo!




