Caterpillars have faces, but not all caterpillars have faces on their butts. On our way up the Quill, we spotted these caterpillars, which seem to be some kind of sphinx moth. Their shape is odd to begin with, but gets even stranger when they adopt a defensive pose.
I’m not 100% sure that their butt is supposed to look like a face, but I think it is. I am about 0% sure what the face is supposed to look like. Perhaps they evolved to mimic some strange alien creature that has since gone extinct. If you have ideas about what it is trying to look like, let us know.
Here’s one of the photos flipped upside down, in case that helps: