Northern Prairie Wildlife Research Center
Wingspan 4.4 cm. Forewing is slightly falcate, pale yellow to darker brown with converging, dentate median and postmedian lines. This geometrid is abundant in wet coastal forests. Moths fly throughout the year. Caterpillars are generalist feeders on the foliage of flowering trees and shrubs such as alder (Alnus), ocean spray (Holodiscus discolor), salmonberry (Rubus spectabilis), willow (Salix), and myrtle (Umbellularia californica).