Shy big moth
I was trying to ID this one since I have never seen it before. It is about the size of a Luna but it ran away before I could get good photos. I had to lighten this one to get a good look at the markings. That’s a #6 nailhead to the left of its wings. From wall to outermost wingtip, it is about 2-1/2 to 3 inches. The body and legs are so thick they almost look swollen. I thought it might be newly morphed because its wings were slightly curled at the back.
The undersides of moths wings often differ radically from the upper sides. Generally, the dorsal view is pictured in identification books. We checked with Eric Eaton to be certain and he informed us that this was a male Polyphemus Moth, Antheraea polyphemus.