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 606 verified sightings
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
Observation date: Apr 28, 2019
Submitted by: gfreund
Region: Napa County, California, United States
Verified by: ishaan2009
Verified date: Oct 21, 2021
Observation date: Apr 28, 2019
Submitted by: Tabiecat
Region: San Diego County, California, United States
Verified by: ishaan2009
Verified date: Oct 21, 2021
Observation date: May 03, 2019
Submitted by: tlcisfree
Region: El Dorado County, California, United States
Verified by: ishaan2009
Verified date: Oct 19, 2021
Observation date: May 07, 2019
Submitted by: Szbeylik
Region: Ventura County, California, United States
Verified by: ishaan2009
Verified date: Oct 19, 2021
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
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