Danaus plexippus - monarch butterfly - larva on milkweed Urbana, Illinois, USA
The prolegs of a late-instar monarch caterpillar grip a twig. Austin, Texas, USA.
Caterpillars often eat the shells of the eggs from which they emerge, as seen in this capture of two hatched and one unhatched polyphemus moth eggs. Urbana, Illinois, USA.
