Ceaonothus Silk Moth
( Hyalophora euryalus )


2010-0427-44150002-LEP00132-Hyalophora_euryalus[0220h34s,F,A,antennae]{DBaumsteiger}-G.jpg

PHOTO COMMENT

IDENTIFICATION
Identification:Hyalophora euryalus
(Boisduval ,1855 )
Common Name:Ceaonothus Silk Moth
Life Stage:(A) adult

PHYLOGENY

Phylum:Arthropoda
Class:Insecta
Superorder:Holometabola
Order:Lepidoptera
Family:Saturniidae
Subfamily:Saturniinae
Tribe:Attacini
Genus:Hyalophora
Taxon Code:LEP00132
ITIS/TSN:936194

LOCATION DETAILS
Location Name
Early Drive, Early Dr, Early Drive, Felton
County:Santa Cruz County
ECI Site#:CA44150000

RECOGNITION
Description
Wings are red to brownish red. Areas outside the narrow white postmedian lines are also red to brownish red, but may have black overscaling. Cell spot on the hindwing is shaped like an elongated comma and touches or breaks the postmedian line. lthough variable, the discal spots are usually greatly elongated towards the outer edge of the wing, and this trait distinguishes euryalus from the other species of Hyalophora.
Wingspan
89 - 127 mm.

BIOLOGY
Females glue eggs singly or in clumps on leaves of the host plant. The eggs hatch in 9-14 days and the caterpillars eat leaves. The cocoon is spun in the outer part of the host plant and is attached to a twig by only one-half its length.
Host
The larvae feed on a wide range of plants including buckbrush (Ceanothus), manzanita (Arctostaphylos), gooseberry (Ribes), madrone (Arbutus menziesii), willows (Salix), alder (Alnus), and mountain mahogany (Cercocarpus betuloides). Ceanothus, Coffeberry (Rhamnus californica), Oregon cherry (Prunus emarginata), Birch (Betula), Hazel (Corylus) and Douglas fir (Pseudotsuga menziesii). Adults do not feed.
Habitat
A wide variety of habitats including coastal areas, chaparral, and conifer forests.
Range
British Columbia east to western Montana, south through Washington, western Oregon, and California to Baja California Sur.
Flight Period
One brood from January-July depending on altitude and seasonal variation.

CREDITS
Photographer
Dennis Baumsteiger
Insect Sciences Museum of California

References
ITIS.
iNaturalist (http://www.inaturalist.org/taxa/50913-Hyalophora-euryalus)
Butterflies & Moths of North America (http://www.butterfliesandmoths.org/species/Hyalophora-euryalus)
Encyclopedia of Life (http://eol.org/pages/385462/hierarchy_entries/59881756/overview)


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