Phaeoura quernaria

Phaeoura quernaria, the Oak Beauty, is a moth of the Geometridae family. It is found in eastern North America, occurring as far west as east-central Alberta. The habitat consists of aspen-cherry shrubland.

The wingspan is 37–56 mm. The wings are powdery light to dark olive brown, with a white patch at the forewing apex. Adults are on wing from February to October in the southern part of the range, where two generations per year occur.

The larvae feed on various hardwood trees, including Betula papyrifera, Salix, Populus and Prunus species. They are grey to brown or greenish. Larvae can be found from June to October. The species overwinters in the pupal stage.