Caterpillar Identification Guide

American Lady (Vanessa virginiensis) caterpillar

Common Name: Black Swallowtail

Genus-Species: Papilio polyxenes

Host Plants: Alexanders - Heart-leaved golden alexander (Zizia aptera), Golden alexander (Zizia aurea), Yellow pimpernel (Taenidia integerrima), Sweet cicely (Osmorhiza claytonii), Rattlesnake master (Eryngium yuccifolium) and Angelica (Angelica atropurpurea)

Habitat: Open areas; fields, meadows and parks where its larval hosts are found.

Comments: The Black Swallowtail is a common butterfly in Wisconsin. It commonly feeds on many different members of the Parsley family, including parsley, carrots, dill, and parsnip. It may also feed on Common Rue (Ruta graveolens), a domesticated herb.