Just a couple of days ago we received a laconic email from a reader. He sent us a photo of what appears to be a caterpillar with one simple question: “Can you tell me what this is[?]” The caterpillar – if it is a caterpillar (and it probably is) – appears to be a bright color. It is perhaps yellow or maybe even entirely white. (The photo of the caterpillar is a bit hard to decipher, as you’ll soon see.) It also appears to be in the woods, or at least some natural setting with rocks, dirt, twigs, and similar such things. So, we have a seemingly simple question before us: what is the bright colored caterpillar in the woods?