Protorthodes oviduca, the Ruddy Quaker Moth, is a moth in the Noctuidae family. It is found across boreal and temperate areas of Canada and the northern United States with extensions in the eastern United States, ranging to central Florida and southern Alabama, and in the mountains in the West as far south as Colorado and Utah. In some areas (such as Ohio and Michigan) it is found only in sandy habitats. The larvae feed on various herbs and grasses.