While we were working in the yard one day, Brian came across this giant moth. It was resting on a pile of limbs he was chopping up, and it blended in so well I am surprised he saw it. He brought it over for me to see, and then gently placed it on the ground a safe distance away from our activity.
I photographed it right then. When we checked on it an hour later, it was gone.
P.S. Upon further research I think this is a Polyphemus Moth, and it feeds on the foliage of the trees.