Northern Prairie Wildlife Research Center
Wingspan 2.4 cm. The wings are yellow to pale brown with fine black speckles and a small round white spot near the discal cell. This geometrid is abundant in oak woodlands west of the Cascade Mountains. Moths fly in summer. Caterpillars feed on foliage of oak (Quercus).
Similar species: Cyclophora pendulinaria wings are pale gray, caterpillars feed on flowering trees and shrubs; species of Scopula (Geometridae) lack the small round discal spot on the forewing, caterpillars feed on herbaceous plants.