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 1 - 24 of 598 verified sightings
Observation date: Apr 25, 2025
Submitted by: dee4nativeflora
Region: Josephine County, Oregon, United States
Verified by: davidwdroppers
Verified date: Apr 26, 2025
Observation date: Apr 26, 2025
Submitted by: Crmiller111046
Region: Douglas County, Oregon, United States
Verified by: davidwdroppers
Verified date: Apr 26, 2025
Observation date: Apr 25, 2025
Submitted by: weflybye
Region: Mason County, Washington, United States
Verified by: davidwdroppers
Verified date: Apr 25, 2025
Observation date: Apr 23, 2025
Submitted by: Saschim
Region: Clallam County, Washington, United States
Verified by: davidwdroppers
Verified date: Apr 24, 2025
Observation date: Apr 18, 2025
Submitted by: Jasonherfindahl
Region: Josephine County, Oregon, United States
Verified by: davidwdroppers
Verified date: Apr 19, 2025
Observation date: Apr 11, 2025
Submitted by: Kmcole
Region: Jackson County, Oregon, United States
Verified by: davidwdroppers
Verified date: Apr 11, 2025
Observation date: Dec 28, 2019
Submitted by: billygigoza
Region: Baja California Norte, Mexico
Verified by: jwileyrains
Verified date: Oct 17, 2024
Observation date: Mar 05, 2018
Submitted by: billygigoza
Region: Baja California Norte, Mexico
Verified by: jwileyrains
Verified date: Oct 17, 2024
Observation date: Jun 05, 2024
Submitted by: KittenWood Mountain
Region: Josephine County, Oregon, United States
Verified by: J_Martineau
Verified date: Jun 06, 2024
Observation date: May 24, 2024
Submitted by: bobscafe
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: May 26, 2024
Observation date: May 24, 2024
Submitted by: bobscafe
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: May 26, 2024
Observation date: May 24, 2024
Submitted by: Herkyl
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: May 25, 2024
Observation date: May 08, 2024
Submitted by: bobscafe
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: May 10, 2024
Observation date: May 04, 2024
Submitted by: AllLegs81
Region: Klamath County, Oregon, United States
Verified by: davidwdroppers
Verified date: May 05, 2024
Observation date: Apr 23, 2024
Submitted by: bobscafe
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: Apr 28, 2024
Observation date: Oct 06, 2023
Submitted by: katrinaoller
Region: San Mateo County, California, United States
Verified by: mcduck
Verified date: Dec 02, 2023
Observation date: Jul 11, 2016
Submitted by: jorm
Region: San Mateo County, California, United States
Verified by: mcduck
Verified date: Aug 23, 2023
Observation date: Jun 24, 2023
Submitted by: bran9522
Region: Nevada County, California, United States
Verified by: mcduck
Verified date: Aug 09, 2023
Observation date: Jul 25, 2023
Submitted by: ckrepky
Region: Jackson County, Oregon, United States
Verified by: J_Martineau
Verified date: Jul 28, 2023
Observation date: May 17, 2023
Submitted by: flyinganvil
Region: Josephine County, Oregon, United States
Verified by: J_Martineau
Verified date: Jul 24, 2023
Observation date: Jun 23, 2023
Submitted by: Giudita13
Region: Pierce County, Washington, United States
Verified by: davidwdroppers
Verified date: Jul 18, 2023
Observation date: Jun 04, 2023
Submitted by: Stacey Terrill
Region: Missoula County, Montana, United States
Verified by: davidwdroppers
Verified date: Jun 07, 2023
Observation date: May 19, 2023
Submitted by: bobscafe
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: Jun 04, 2023
Observation date: Jan 25, 2023
Submitted by: Desidoodles59
Region: Kern County, California, United States
Verified by: mcduck
Verified date: May 31, 2023
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