I found this battered luna moth (Actias luna) yesterday around noon. It was clinging to some grass blades out in the blazing sun by the side of a road. Something had torn off most of its right wing. It was alive, but could no longer fly. I picked it up and left it in the shade of a tree. About 45 minutes later on my way back from my walk, it was still there. So I put it under my hat and brought it to my office.
It just stayed there in my hat the rest of the afternoon. This morning I found it tucked into the corner of a wooden box on the shelf below the hat. It was still alive.
The moth's wide and branched antennae identify it as a male (here is a comparison of the antennae of male and female moths). The males use their big antennae to detect the pheromones emitted by the females.
If I get a chance to take better close-up pictures of the antennae, I will post them here.