About Furcula occidentalis Lintner, 1878
Furcula occidentalis, commonly called the western furcula moth, double-lined furcula, or willow kitten, is a moth species belonging to the family Notodontidae. Its range extends from southern Yukon and British Columbia east to Nova Scotia, south to Maryland, and west to Utah and Oregon. This species has a wingspan of 32 to 45 millimeters. Adult moths are active from April to August, with one to two generations produced each year. The larvae of Furcula occidentalis feed on species of Salix, and sometimes feed on Populus species. Larvae can be found from June to September, and the species overwinters in the pupal stage.
