Red Admiral

Red Admiral caterpillars construct conspicuous nests or leaf shelters on nettles including stinging nettle (Urtica dioica), false nettle (Boehmeria cylindrica,) and others.

Stinging nettle can be found in canyons and near rivers.  If you look for larvae, wear rubber gloves as this host plant can badly irritate your skin and cause a lot of pain!

Click here to watch a basic video of the Utah Butterfly Field Trips folks looking for and finding red admiral caterpillars on stinging nettle.