Adults fly mainly from mid-July to September (Davis 2007).
The larvae feed on the foliage of species of
Pinaceae, in particular
Douglas-fir (
Pseudotsuga menziesii) and
western hemlock (
Tsuga heterophylla) and flowering trees and shrubs such as madrone (
Arbutus menziesii), myrica (
Myrica), and
huckleberry (
Vaccinium) (USGS 2006).