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NO. 011Banded woolly bear, larva illustrationIllustration · not shown at life size

Caterpillars / Insect

Banded woolly bear

Pyrrharctia isabella

Larval stageAn everyday search

Black at both ends and rusty in the middle: this fuzzy caterpillar becomes an Isabella tiger moth.

Let’s look closer

Little clues

Three things to notice.

  1. Black bristles at both ends.

  2. Rust-colored middle band.

  3. Becomes an Isabella tiger moth.

Out in the world

Where to look.

Around southeastern Wisconsin

Paths and yards in fall.

When to look

Look for the caterpillar on fall paths. It spends winter tucked away, then wakes again in spring.

Look closely. Leave your tiny neighbor where you found it.

A closer look

One clue is just the start.

This is the caterpillar, or larva. The rusty band can be wide or narrow, so two woolly bears may look different.

A special find can be hard to spot without being biologically rare. Encounters depend on season and habitat.

For curious grownups, too

Read a little further.

Original summaries, with references for deeper reading.