The Macculloch’s flies in spring and summer, generally earlier at low elevations and later at higher elevations. Adults visit flowers, with individuals noted taking nectar from Kinnikinnick (Arctostaphylos uva-ursi) in the Cascades. Larvae are specialists of various plants in the primrose family, including clarkia, fireweed, and evening primrose. This moth is widely distributed in open habitats across Canada, extending throughout much of western North America. 

Size: 10 – 13 mm

Photo by: Glenn Marangelo on 7/16/22 SW of Phillipsburg, MT