Identification: The forewings have a greyish ground color with rather obscure maculation apart from two black crosslines
Wing Span: 2.0 cm
Life History: The larvae are twig mimics. They are rusty brown with a greenish-brown head. Full-grown larvae reach a length of about 20 mm. Larvae can be found from mid-July to September and pupation occurs in September. The species overwinters in the pupal stage.
Flight: February to October
Caterpillar Hosts: Juniperus scopulorum, Juniperus communis, Thuja plicata, Populus balsamifera trichocarpa, Pinus strobus, Pinus contorta var. latifolia, Pseudotsuga menziesii var. glauca, Abies lasiocarpa, Tsuga heterophylla and Betula papyrifera.
Range: Western North America from British Columbia south to California.