Ceanothus Silk Moth
Common NameCeanothus Silk Moth
Scientific NameHyalophora euryalus
FamilySaturniidae
SubfamilySaturniinae
Wingspan (mm)105
Wing Patternstriped
Primary Colorsreddish-brown, maroon, white, black
HabitatForests, woodlands, chaparral, riparian areas
Geographic RangeWestern North America, from British Columbia south to Baja California and east to the Rocky Mountains
Host PlantsCeanothus, Prunus, Salix, Alnus, Betula, Ribes, Arctostaphylos, Rhamnus
Flight PeriodMay to July
Conservation Statusleast-concern
Lifecycle NotesLarvae are green with yellow tubercles, feeding on various woody plants. They pupate in a silken cocoon, often attached to host plants, and overwinter as pupae before adults emerge in spring or early summer.
Identification TipsDistinguished by its large size, reddish-brown coloration, and the distinctive white crescent-shaped markings on all four wings, often bordered with black. Males have large, feathery antennae.
Description
A large, robust moth with broad wings primarily reddish-brown to maroon, featuring prominent white and black-bordered bands and crescent-shaped white markings on all wings. Small black eyespots are present near the wing tips.
