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.
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Verified Sightings
Displaying 97 - 120 of 622 verified sightings
Observation date: Jun 28, 2019
Submitted by: BugGeek71
Region: Riverside County, California, United States
Verified by: mcduck
Verified date: Mar 14, 2022
Observation date: Mar 02, 2022
Submitted by: turtletowne
Region: Riverside County, California, United States
Verified by: mcduck
Verified date: Mar 02, 2022
Observation date: Jul 21, 2017
Submitted by: aunechild
Region: Humboldt County, California, United States
Verified by: jwileyrains
Verified date: Feb 25, 2022
Observation date: Sep 28, 2018
Submitted by: Osolobo
Region: San Luis Obispo County, California, United States
Verified by: jwileyrains
Verified date: Feb 24, 2022
Observation date: Feb 16, 2018
Submitted by: armdnrdy
Region: San Bernardino County, California, United States
Verified by: ishaan2009
Verified date: Dec 21, 2021
Observation date: May 10, 2018
Submitted by: lucashiker1598
Region: Tuolumne County, California, United States
Verified by: ishaan2009
Verified date: Nov 15, 2021
Observation date: Jun 01, 2016
Submitted by: Svnelson
Region: Placer County, California, United States
Verified by: mcduck
Verified date: Nov 08, 2021
Observation date: Mar 02, 2019
Submitted by: Picassobonaparte
Region: San Diego County, California, United States
Verified by: ishaan2009
Verified date: Oct 31, 2021
Observation date: Apr 09, 2016
Submitted by: Sayheymj
Region: Amador County, California, United States
Verified by: ishaan2009
Verified date: Oct 31, 2021
Observation date: Apr 03, 2019
Submitted by: benlcarson
Region: Santa Cruz County, California, United States
Verified by: ishaan2009
Verified date: Oct 28, 2021
Observation date: Feb 03, 2020
Submitted by: rhardoon
Region: San Diego County, California, United States
Verified by: mcduck
Verified date: Oct 28, 2021
Observation date: Feb 29, 2020
Submitted by: LSordelet
Region: San Luis Obispo County, California, United States
Verified by: mcduck
Verified date: Oct 28, 2021
Observation date: Mar 14, 2020
Submitted by: Charmel
Region: San Luis Obispo County, California, United States
Verified by: mcduck
Verified date: Oct 28, 2021
Observation date: May 07, 2019
Submitted by: Samela95437
Region: Mendocino County, California, United States
Verified by: mcduck
Verified date: Oct 28, 2021
Observation date: Apr 02, 2020
Submitted by: nparkin34
Region: Sonoma County, California, United States
Verified by: mcduck
Verified date: Oct 28, 2021
Observation date: Apr 17, 2020
Submitted by: Mrjdj3
Region: Butte County, California, United States
Verified by: mcduck
Verified date: Oct 28, 2021
Observation date: Apr 26, 2020
Submitted by: Kdaemons_nymph
Region: El Dorado County, California, United States
Verified by: mcduck
Verified date: Oct 28, 2021
Observation date: May 08, 2020
Submitted by: Hues2020
Region: Santa Clara County, California, United States
Verified by: mcduck
Verified date: Oct 27, 2021
Observation date: May 11, 2020
Submitted by: Positivenrg
Region: Orange County, California, United States
Verified by: mcduck
Verified date: Oct 27, 2021
Observation date: May 11, 2020
Submitted by: Positivenrg
Region: Orange County, California, United States
Verified by: mcduck
Verified date: Oct 27, 2021
Observation date: Apr 18, 2021
Submitted by: shutterrev
Region: San Diego County, California, United States
Verified by: mcduck
Verified date: Oct 23, 2021
Observation date: May 05, 2018
Submitted by: Fortch
Region: San Bernardino County, California, United States
Verified by: ishaan2009
Verified date: Oct 21, 2021
Observation date: Apr 13, 2019
Submitted by: jahollier
Region: San Luis Obispo County, California, United States
Verified by: ishaan2009
Verified date: Oct 21, 2021
Observation date: Apr 24, 2019
Submitted by: Jamie760
Region: San Diego County, California, United States
Verified by: ishaan2009
Verified date: Oct 21, 2021
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