We found this Luna Moth under an outside light which we inadvertently left on overnight. This fellow is male, evidenced by his big antennae which are designed for detecting female pheromones. Adult Luna Moths have no mouth parts or digestive system so are solely in the business of mating. They live only a week or so.
I have never actually seen one before and in fact, they are not commonly seen because they fly only during the night and usually spend their days away from human eyes. I love the fact that I can reach 40 something years old and still have completely new experiences without leaving home.