The Clover Looper or Range Grass Moth (Caenurgina crassiuscula) is a moth of the Erebidae family. It is found from coast to coast in the United States and adjacent parts of Canada, in the west to the Northwest Territories, Yukon, and Alaska. The wingspan is 30–40 mm. Adults are on wing from March to November depending on the location. The larvae feed on various species of clover, grass, and lupine.