This is one of the few if not the only moth to fly in winter. Only the male flies. The female is flightless with only vestigial wings. The moth belongs to the genus Operophtera. Only two species of Operophtera are found in North America. One is native, the other came from Europe. These moths hang out by our back porchlight in winter. #moth #Operophtera #wintermoth #entomology #PNW