Gymgirl wrote: If your "moth poop" look like black bee bees, or black pellets, it might NOT be moth poop. It's Harry.
Look for him on the outtermost branches, near the tips. He'll be on the leaf big enough to hold his body weight. The size of the poop is a determinant of just how big or how small Harry might be.
I saw gynormous size poop on my bell peppers, and knew he was gonna be a big one. I stood for 25 minutes trying to find him, and finally let him win that round. But, I went out later, and, there he was, curled around a squash plant at the very tip top, munching away.
Harry was relocated to the yard over my fence...I don't kill them, because they make an absolutely beautiful, velvety luna moth, that's a wonder to behold!