This is the largest (FW length 21-25mm) of our PNW Peros. Ironically there is one called P. gigantea, which flies in the southern Rockies, but it is actually smaller. Like all Peros the patterns (maculation) of P mizon are widely variable. However the size and relatively later flight season (June-August) are good clues.
This is a common moth in forests west of the Cascades. The larvae feed on a wide variety of plants including Pseudotsuga menziesii (Douglas Fir) and other conifers, Holodiscus discolor (Ocean Spray), Alnus rubra (Red Alder), and Acer spp (Maples).
https://bugguide.net/node/view/70137
Size– FW length 21-25mm
Habitat– Mesic mixed and coniferous forests
Range– West of the Cascades, and the western side of the Rockies- absent from the more arid parts of the region
Eats– Larval hosts are plants in the families Grossulariaceae, Pinaceae, and Rosaceae.
Flight Season– June to August
