Caterpillar Identification Guide

American Lady (Vanessa virginiensis) caterpillar

Common Buckeye

Genus-Species: Junonia coernia

Host Plants: Blue toadflax (Linaria canadensis), American plantain, Black seeded plantain or Red stalked plantain (Plantago rugelii), Wild petunia ( Ruellia humilis), Blue vervain (Verbena hastata), Hoary vervain (Verbena stricta) and False foxgloves (Agalinis species or Gerardia species)

Habitat: Open, dry fields, roadsides, trails, and waste areas.

Comments: The Common Buckeye is not a common butterfly in Wisconsin, but as an immigrant from farther south, it makes it to Wisconsin on a fairly regular basis and is always a pleasure to see.

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.