The world of a butterfly: The transformation of a caterpillar into a butterfly is one of nature's most amazing feats. These photographs show the development of an eastern black swallowtail butterfly from egg to larva to chrysalis to adult. (Page 7)
The larva clings to the stem of a parsley plant. Although butterfly and moth caterpillars appear to have many legs, as insects, they have only six true legs — visible here just behind the larva’s head.