Caterpillar Identification Guide

American Lady (Vanessa virginiensis) caterpillar

Clouded Sulphur

Genus-Species: Colias philodice

Host Plants: Plants in the pea family including alfalfa (Medicago sativa), white clover (Trifolium repens), and pea (Pisum sativum).

Habitat: Many different open areas including fields, lawns, alfalfa and clover fields, road edges, meadows.

Comments: Caterpillars are grass green with a multicolored stripe along the lower edges of the body. The upper stripe is white; followed by red/pink; white; and finally black.

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.