This is a Cecropia Moth. They are so cool. They can have a wing span of 5 to 6 inches. This guy (and yes we know it's a boy) has a wing span of about 5 1/2. The girl moth emits pheromones at night (Oh, love is in the air da da da dada), which the fella moth can detect with his big bushy antennae. (That's how we know ours was a guy.) He will then fly in search of her, miles if necessary. That is a lot of flapping for those wings. We kept him for the day in a jar.Releasing him in the evening,so he could find himself a little gal moth.