The Black Swallowtail caterpillar was in the same place today. He had devoured the Queen Anne's Lace. I had forgotten about their tentacles. I touched him and the bright orange tentacles came out briefly. They release a foul odor, if the caterpillar feels threatened. I tried to get a pic by myself, but I wasn't fast enough. I asked for hubby's help. I focused on the caterpillar and then he touched him. Teamwork! :0)