Does a Parsley Caterpillar Become a Butterfly? Yes! The caterpillar most frequently found on parsley, dill, fennel, and related plants are the larval forms of the black swallowtail (Papilio ...

"These beautiful butterflies lay their eggs on parsley, where the caterpillars will grow until it's their turn to transform into a butterfly," says Ghafari. "If you see these green, black ...