Skiff Moth Slug Caterpillar
The one above is also sporting the two bilateral white spots frequently seen on this species. These spots look remarkably like the Tachnid fly eggs one will sometimes also see on these & other Slug ‘Pillars.
Shenandoah National Park, Virginia, USA. Photos taken of wild critters where I find them. No posing, pestering, or baiting, & aiming to leave no trace. Corrections welcome to my critter IDs. Olympus EM1 Mark II, M.Zuiko ED 60mm f2.8 Macro, Fenix Headlamp & Focusing Lights, Godox TT350o Flash. DIY Diffuser. Handheld.