Caterpillar Identification Guide

American Lady (Vanessa virginiensis) caterpillar

Dainty Sulphur

Genus-Species: Nathalis iole

Host Plants: Low-growing plants in the aster family (Asteraceae) especially shepherd's needle (Bidens pilosa), sneezeweed (Helenium), fetid marigold (Dyssodia), and cultivated marigold (Tagetes).

Habitat: Open, dry places including coastal flats, weedy fields, grasslands, road edges, meadows, and hillsides.

Comments: Caterpillar ranges up to 5/-inch, dark green with purple stripes on its back, and parallel black and yellow stripes on the side

Bog Fritillary, Boloria eunomia

Caterpillar Anatomy: A Tutorial

Caterpillars come in many colors, shapes, and sizes. Some caterpillars are quite hairy, while others are smooth. Despite differences between species, though, all caterpillars share certain morphological features.

Bee Quiz Graphic

Caterpillar Quiz

Take this quick quiz and see how much you know about caterpillars. This quiz is intended for fun, in a random-facts-can-be-cool kind of way.

Eastern Tiger Swallowtail, Papilio glaucus

How Caterpillars Change Into Butterflies

How does this magic happen? Learn about metamorphosis - the process of transformation from an immature form to an adult bitterfly.