This little day-flying moth looks more like a butterfly, as it flies around in the spring looking for early wildflowers. This one was seen drinking from a spring in a hawthorn draw in Missoula. The little greenish caterpillars feed on hawthorns, as well as chokecherries, alders, serviceberries, and poplars.
Photo by Kristi DuBois near the end of April in Missoula, MT