Actias luna (Luna Moth).
 
 
 
Photo: 03/20/04, 9 pm.


Okay, I am pretty sure about this one. I'd say it's a luna moth (Actias luna). This moth was huge and has a very striking tail. Its width is about 4 inch. Their caterpillars feed on sweet-gum trees which I have in my yard. Notice the eyespots on the wings. The adult moth has no mouth, does not eat all, and lives only ~1 week. Its sole purpose is to mate. 
 
 
wikipedia:
http://en.wikipedia.org/wiki/Luna_Moth