Note the upside-down M-shaped mark on the FW. There are two black spots above it, sort of shaped like a bow-tie. Sometimes this mark is also present on the HW. The color of the wings and the boldness of the lines is are extremely variable in the species.
This species is extremely common and widespread, and is one of the moths you can count on finding every year at almost any location, though rarely in huge numbers.
Distribution pattern: Transcontinental.
Reilly pers obs
Reported as a forest defoliator in Canada (McGuffin 1977).