Sycamore tussock moth (Halysidota harrisii) caterpillar at Hildacy Farm Preserve in Media, PA. I remember these as a child mainly because of their urticating hairs. But they are also really, really cute. I especially like the white ones because their orange tufts stand out better than on the yellow variety. Don’t you just want to pick it up?? If by chance you don’t know what “urticating” means, I highly recommend the experience. You won’t forget.