This is a fairly common copper that flies in multiple broods from April to October depending on location. Hosts include members of the Polygonaceae including species of Rumex such as salicifolius. They also use knotweeds (Polygonum spp. and also common knotweed, Persicaria lapathifolia). Males and females differ dramatically in dorsal wing coloration, but both are handsome butterflies. A reliable spot for these for me has been Trout Pond Trailhead at Cuyamaca Lake in the late summer/early fall.