Underwing moths (genus Catocala) are hard to tell apart; our best guess is the Once-married Underwing. We’re sure there’s an interesting story behind how this moth got it’s name …but these large moths can be found from British Columbia to Newfoundland, south to Connecticut and Pennsylvania, west to Colorado and Montana. The adult moths can be observed from July through October, but are usually found later in the summer / early fall. The larvae feed on leaves of Populus spp. (aspen, cottonwood, poplar) and willow.

Size: Wingspan 70-90 mm 

Photo by: Kristi DuBois on 8/28/21 in Missoula, MT