Can you help us identify these caterpillars? My daughter would like to try to keep them until they form a butterfly or moth. I need to find instructions on how to do this as I assume they are the kind that overwinter somehow. We live in Illinois and found them in our yard feding on the weed (picture of this also attached). They look like Catalpa moths, but we don’t have any catalpa trees in our area, and they are feeding on this weed, not a tree. If you can give us instructions for overwintering that would be great also, but even if we just have an identification, I can do some web research.
You should be able to find all you need to know about raising White Lined Sphinx Caterpillars, Hyles lineata, by visiting Bill Oehlke’s site.