Hyalophora cecropia,
Cecropia Moths

Additional on-line references:
Bugguide:

http://bugguide.net/node/view/4625
Moth Photogrraphers' Group:
http://mothphotographersgroup.msstate.edu/species.php?hodges=7767

I have been rearing this species locally for several years. All of these are from local Wake Co. stocks originally collected off Old Stage Road & Hwy. NC 50 in se. Wake Co.

Here in central NC, males of this species are usually seen responding to the pheromones of calling females ~30 minutes or less of sunrise.