I took this picture of a caterpillar back in August, I had no idea what it is.
Over at What's that Bug, they seem to identify every fuzzy caterpillar as a wooly bear, as a caterpillar of a tiger moth. I've always reserved the name "wooly bear" for the black/brown and orange caterpillars, the common banded wooly bear, adult Isabella tiger moth (family, Arctiidae), that appear all over the place in the fall. Word is, you can predict the severity of the winter to come by the width of the lighter band--if you know which way it goes, i.e., whether a wider orange band means milder or more severe. Sadly, I don't know this.
I searched around with my tiger moth clue, to no avail, until I remembered to check Bev Wigney's gallery, where I found an image of the caterpillar of a Virginian tiger moth. (The great thing about Bev is not only that her photographs are so good, but she takes most of them not too far east of Thomasburg.) I don't see any yellow on her caterpillar, but otherwise it seems very similar to mine--could it be?