Promethea Silkmoths is who.
After shooting the Swamp Spreadwing at Gauco Pond I went to Branch Bridge Road hoping for dragons or damsels. But all I got was this chance to photograph Promethea Silkworm moth larvae-Callosamia promethea. This first was a little soft but I was able to reposition and get a more parallel composition of a second imdividual.
And finally a little Buttonbush chomping closeup.
All with the 5D Mark IV, 180 Macro + 2.0 doubler upon a tripod. Most of the images I saw on BugGuide showed cats with orange or red festooning at the rear so I am guessing these are late but not last instars.
Oh. The Common Buttonbush-Cephalanthus occidentalis are maturing and the flowerheads are becoming an attractive burned color.