Males perch in hillside hollows to watch for females. Eggs are laid in groups of 2-4 on lower leaves of host plant, or singly on other parts of plant. Caterpillars rest during the day in shelters of leaves tied together with silk, emerging at night to feed. Young caterpillars feed on leaves, older caterpillars eat leaves and stems. Young caterpillars hibernate inside plant parts such as dried flower heads of Eriogonum fasciculatum.