I hope it not one of those prickle pear eating moths from Louisiana.
BTW Welcome to 2cool. Warning this site is very adictive. If you can't devote at least 4 hours of work time a day to it you might rethink being a 2cooler. LOL <G>
I google image searched Luna Moth and that is very close. It probably is some sort of variant of that. Same markings on the wings but the ones I saw were all green and had different tail wing structure. I'm not a bug guy but I think your close Joker it must be some sort of Texas Variant of the Luna Moth.