I don't do many caterpillar photos, simply because I don't know them.
Often colourful, many are unusual and they are all magical.
To go from this to a butterfly is really amazing.
According to our field guide, Caterpillars of Eastern North America, this is the caterpillar of the mourning cloak, nymphalis antiopa.
Bravedeer has a good photo of the adult
if you are interested.