About Hyalophora euryalus Boisduval, 1855
Hyalophora euryalus, commonly known as the ceanothus silkmoth, is a moth species belonging to the family Saturniidae. This species was first formally described by Jean Baptiste Boisduval in 1855. It can be found in dry intermontane valleys and the interior region of British Columbia, Canada, ranging as far north as Prince George along the Fraser River, and extending south into Baja California, Mexico. The wingspan of adult ceanothus silkmoths measures between 89 and 127 millimeters. Adults are active between January and July, with the exact timing varying based on location. This species produces one generation each year. The larvae feed on a range of plant genera and species, including Ceanothus, Rhamnus californica, Prunus emarginata, Arctostaphylos, Alnus, Betula, Corylus, Ribes, Pseudotsuga menziesii, Arbutus menziesii, Liquidambar, and Salix.
