This striking, day-flying moth flies mostly in May and early June in open coniferous woods and northern peat bogs across the north. It ranges from Alaska to Newfoundland, south in the east to Connecticut, and south in the west in Colorado. Females lay eggs during the summer on the underside of a host plant, which includes Leather-leaf (Chamaedaphne calyculata), bearberry (Arctostaphylos uva-ursi), and blueberry (Vaccinium myrtilloides). The eggs hatch within one or two weeks and caterpillars feed for about 40 days before overwintering as pupae.
Photo by Kristi DuBois on 6/3/20 in Pattee Canyon Recreation Area near Missoula, MT.