A prickly and curled up Question Mark butterfly caterpillar.

In case anyone stopping in doesn’t know, I also post pictures on flickr. (Opens in a new window.) I thought today would be a good day for a crossover post; I put up a bunch of pictures of this Question Mark caterpillar!

And here’s a shot with a little sibling on the other side of the leaf (big sib peeping out from the munched hole)…

Then and now, a window: an early instar caterpillar fits neatly along the vein of the leaf while a late instar question mark caterpillar only shows its prolegs through a well-munched hole in the leaf.