Ceanothus Silkmoth (Hyalophora euryalus): This massive moth has a wingspan between 3.5 to 5 inches. It is found from British Columbia east to western Montana, south through Washington, western Oregon, and California to Baja California Sur. There is only one brood a year with adults generally emerging from mid May to mid June in western Montana. Adults emerge without functional mouthparts …meaning that they do not feed. Their only purpose it mate and pass their genes onto the next generation. It strongly resembles the Glover’s Silkmoth (also found in Montana), which has a grayish border to the wings as apposed to the Ceanothus Silkmoth’s reddish / pink border. Photo by Kathy (Morgan McNeill’s Mom) on 5/14/18 in Plains, MT.