Our summer fundraiser has arrived, and we need your help!
We depend on donations to keep Butterflies and Moths of North America freely available. If everyone who uses this resource makes a donation, we could cover our ongoing costs, develop new features, upgrade the system, and maybe even remove those pesky ads. Please make a one-time or recurring donation to show your support for this valuable source of information. Thank you!
Identification: Forewing light brown with white-edged dark brown lines; subterminal line with three prominent pointed teeth near costa and short horizontal dash at costa; a total of five distinct lines cross the wing (as opposed to eight lines in Operophtera bruceata); no noticeable terminal line; fringe checkered with dark and pale patches of about equal width; hindwing brownish-gray with small discal spot and checkered fringe
Wing Span: 3.0 cm
Flight: March to June
Caterpillar Hosts: Primarily leaves of Western Hemlock and Sitka Spruce; other hosts include Amabilis Fir, Subalpine Fir, Engelmann Spruce, White Spruce, Douglas-fir, Mountain Hemlock, Western Larch.
Habitat: coniferous forests
Range: British Columbia to northern California; common to uncommon along the coast; rare inland
Taxonomy Notes: Formerly in the genus Epirrita, Zootaxa, 4258(2): 145–156.
We want to express our gratitude to all who showed their support by making a contribution this year. You can donate to support this project at any time.