Late last week Jim spotted the creature below hanging on the side of the building. After a little bit of internet research I'm thinking that it might be a Blinded Sphinx Moth (Paonias excaecatus). I'm definitely not a moth expert at the best of times, though, so if this is a wrong identification please let me know.
Sphinx moths like this one camouflage as dried-up leaves to keep from being eaten by birds and other predators.
The Blinded Sphinx Moth gets its nickname because the eyespots on its underwings (not visible in these photos) lack a "pupil".