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 1)
The egg of an eastern black swallowtail butterfly (Papilo polyxenes) shortly after it has been laid. The leaves are parsley, which is one of a few plants eaten by the larva.