Northern Prairie Wildlife Research Center
Wingspan 3.6 cm. Forewing is mostly gray with jagged median and basal lines and a small black discal spot. This geometrid is common and widely distributed in western North America. Moths fly in mid to late summer. Caterpillars feed on the foliage of conifers, generally species of Pinaceae and most on Douglas-fir (Pseudotsuga menziesii).
Similar species: Nepytia swetti is smaller and occurs in the southern Rocky Mountain region.