About Orgyia vetusta Boisduval, 1852
Orgyia vetusta, also known as the western tussock moth, was formerly classified as Hemerocampa vetusta. It is a moth species found in the Pacific States and British Columbia. There is an isolated population of this moth in Boise County, Idaho, and it has also been observed in U.S. Gulf Coast states such as Louisiana. The species is sexually dimorphic, with flightless females. Western tussock moths have been reported on almost all California oak species, as well as various fruit and nut trees, ceanothus, hawthorn, manzanita, pyracantha, toyon, walnut, and willow.
