How really beautiful it looks!
At first we thought it was two, sorta butterflies. Very Strange.
Well, after Looking it up, (thanks to Deborah).. Its a Luna Moth. Actually very rare. The Luna Moth has wingspan of up to four and a half inches. The luna moth emerge as adults and live for around 7 days. Thier only purpose is to mate and lay eggs. They are generally out around the March to July season.