This big guy is a Cecropia Moth, best as I can tell, I have been wrong before concerning various things. It is North Americas largest native moth. It is a member of the giant silk moth family. I found this one right here on my deck.
According to Wikipedia:
Like all members of the Giant Silk Moth family, the nocturnal adult cecropia moths are designed only to reproduce, lacking functional mouthparts or digestive system. Therefore, they survive a maximum of about two weeks"
For more info check out the links below:
Wormspit
Wikipedia
