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
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Verified Sightings
Displaying 25 - 48 of 522 verified sightings
Observation date: Jan 12, 2019
Submitted by: Scott Burgess
Region: Trinity County, California, United States
Verified by: ishaan2009
Verified date: Oct 16, 2021
Observation date: Jun 20, 2019
Submitted by: Team Kweeper
Region: Fresno County, California, United States
Verified by: ishaan2009
Verified date: Oct 16, 2021
Observation date: Feb 28, 2020
Submitted by: kjburkhart
Region: Napa County, California, United States
Verified by: ishaan2009
Verified date: Oct 14, 2021
Observation date: Mar 05, 2020
Submitted by: Th2000
Region: Contra Costa County, California, United States
Verified by: ishaan2009
Verified date: Oct 14, 2021
Observation date: Feb 25, 2020
Submitted by: Wooley
Region: San Bernardino County, California, United States
Verified by: ishaan2009
Verified date: Oct 14, 2021
Observation date: Mar 14, 2020
Submitted by: Charmel
Region: San Luis Obispo County, California, United States
Verified by: ishaan2009
Verified date: Oct 14, 2021
Observation date: Mar 24, 2020
Submitted by: sdjimbob
Region: San Diego County, California, United States
Verified by: ishaan2009
Verified date: Oct 14, 2021
Observation date: Mar 24, 2020
Submitted by: lukewillsit
Region: Marin County, California, United States
Verified by: ishaan2009
Verified date: Oct 14, 2021
Observation date: Apr 16, 2020
Submitted by: Terryzamora
Region: Santa Clara County, California, United States
Verified by: ishaan2009
Verified date: Oct 14, 2021
Observation date: Apr 20, 2020
Submitted by: Dtyler1674
Region: Napa County, California, United States
Verified by: ishaan2009
Verified date: Oct 14, 2021
Observation date: Apr 21, 2020
Submitted by: cyndiledet@gmail.com
Region: Nevada County, California, United States
Verified by: ishaan2009
Verified date: Oct 14, 2021
Observation date: May 13, 2020
Submitted by: Thxboy
Region: Calaveras County, California, United States
Verified by: ishaan2009
Verified date: Oct 14, 2021
Observation date: Jun 15, 2020
Submitted by: milabuchi
Region: Nevada County, California, United States
Verified by: ishaan2009
Verified date: Oct 14, 2021
Observation date: Jul 08, 2020
Submitted by: Hummingone
Region: San Mateo County, California, United States
Verified by: ishaan2009
Verified date: Oct 14, 2021
Observation date: May 30, 2021
Submitted by: Rccarlson64
Region: Chelan County, Washington, United States
Verified by: davidwdroppers
Verified date: Jun 25, 2021
Observation date: May 15, 2021
Submitted by: weflybye
Region: Mason County, Washington, United States
Verified by: davidwdroppers
Verified date: May 17, 2021
Observation date: May 17, 2021
Submitted by: andersca
Region: Grays Harbor County, Washington, United States
Verified by: davidwdroppers
Verified date: May 17, 2021
Observation date: May 13, 2021
Submitted by: Tjoneszeus
Region: Bonner County, Idaho, United States
Verified by: J_Martineau
Verified date: May 17, 2021
Observation date: May 13, 2021
Submitted by: Tjoneszeus
Region: Bonner County, Idaho, United States
Verified by: J_Martineau
Verified date: May 17, 2021
Observation date: May 14, 2021
Submitted by: TenTen
Region: King County, Washington, United States
Verified by: davidwdroppers
Verified date: May 15, 2021
Observation date: May 11, 2021
Submitted by: NicoleS
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: May 13, 2021
Observation date: May 12, 2021
Submitted by: snp500
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: May 13, 2021
Observation date: May 09, 2021
Submitted by: fenners
Region: Jackson County, Oregon, United States
Verified by: J_Martineau
Verified date: May 10, 2021
Observation date: May 08, 2021
Submitted by: snp500
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: May 08, 2021
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