Ceanothus silkmoth
Hyalophora euryalus (Boisduval, 1855)
Family: Saturniidae
Subfamily: Saturniinae
Identification: 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.
Wing Span: 3.5 - 5 inches (8.9 - 12.7 cm).
Life History: 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.
Flight: One brood from January-July depending on altitude and seasonal variation.
Caterpillar Hosts: A wide range of plants including buckbrush (Ceanothus), manzanita (Arctostaphylos), gooseberry (Ribes), madrone (Arbutus menziesii), willows (Salix), alder (Alnus), and mountain mahogany (Cercocarpus betuloides).
Adult Food: 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.
Conservation: Not usually required.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: None reported.
Comments: NULL
Verified Sightings
Displaying 25 - 48 of 429 verified sightings
Observation date: Jun 24, 2018
Submitted by: michelleron222
Region: Ada County, Idaho, United States
Verified by: J_Martineau
Verified date: Oct 09, 2018
Observation date: Mar 26, 2016
Submitted by: CrossfitAndrew
Region: Orange County, California, United States
Verified by: BAMONA
Verified date: Oct 09, 2018
Observation date: Feb 12, 2018
Submitted by: lilih
Region: Santa Clara County, California, United States
Verified by: BAMONA
Verified date: Oct 09, 2018
Observation date: May 11, 2016
Submitted by: annexkilo
Region: Kootenai County, Idaho, United States
Verified by: J_Martineau
Verified date: Sep 06, 2018
Observation date: May 14, 2016
Submitted by: Pinto point
Region: Bonner County, Idaho, United States
Verified by: J_Martineau
Verified date: Sep 06, 2018
Observation date: Jul 17, 2018
Submitted by: ericofShaw
Region: San Juan County, Washington, United States
Verified by: davidwdroppers
Verified date: Jul 22, 2018
Observation date: Jul 04, 2018
Submitted by: BlondeMapleSyrup
Region: San Juan County, Washington, United States
Verified by: davidwdroppers
Verified date: Jul 16, 2018
Observation date: May 21, 2018
Submitted by: DotMcD
Region: Kootenai County, Idaho, United States
Verified by: J_Martineau
Verified date: Jun 25, 2018
Observation date: Jun 15, 2018
Submitted by: bclynd
Region: Chelan County, Washington, United States
Verified by: davidwdroppers
Verified date: Jun 18, 2018
Observation date: Jun 11, 2018
Submitted by: Briwat
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: Jun 14, 2018
Observation date: Jun 07, 2018
Submitted by: bab72
Region: Clark County, Washington, United States
Verified by: davidwdroppers
Verified date: Jun 09, 2018
Observation date: Jun 09, 2018
Submitted by: shellwoll95
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: Jun 09, 2018
Observation date: Jun 02, 2018
Submitted by: Lydia Ruth
Region: Boise County, Idaho, United States
Verified by: J_Martineau
Verified date: Jun 07, 2018
Observation date: May 30, 2018
Submitted by: Rlott
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: Jun 02, 2018
Observation date: May 28, 2018
Submitted by: cappy0179
Region: Kootenai County, Idaho, United States
Verified by: J_Martineau
Verified date: May 31, 2018
Observation date: May 27, 2018
Submitted by: Mad Madam
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: May 27, 2018
Observation date: May 18, 2018
Submitted by: Julina Sutter
Region: Kootenai County, Idaho, United States
Verified by: J_Martineau
Verified date: May 23, 2018
Observation date: May 18, 2018
Submitted by: AshleyLombardo98312
Region: Kitsap County, Washington, United States
Verified by: davidwdroppers
Verified date: May 23, 2018
Observation date: May 11, 2018
Submitted by: Mell Derksema
Region: San Juan County, Washington, United States
Verified by: davidwdroppers
Verified date: May 23, 2018
Observation date: May 18, 2018
Submitted by: heatherp0416
Region: Kittitas County, Washington, United States
Verified by: davidwdroppers
Verified date: May 23, 2018
Observation date: May 19, 2018
Submitted by: Zach Eckert
Region: King County, Washington, United States
Verified by: davidwdroppers
Verified date: May 22, 2018
Observation date: May 07, 2018
Submitted by: Issa Lister
Region: Thurston County, Washington, United States
Verified by: davidwdroppers
Verified date: May 14, 2018
Observation date: May 04, 2018
Submitted by: whidbeytomas
Region: Island County, Washington, United States
Verified by: davidwdroppers
Verified date: May 14, 2018
Observation date: May 07, 2018
Submitted by: shamanteachers
Region: Mason County, Washington, United States
Verified by: davidwdroppers
Verified date: May 14, 2018
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