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 25 - 48 of 583 verified sightings
Observation date: May 12, 2018
Submitted by: Andreaparker
Region: Calaveras County, California, United States
Verified by: mcduck
Verified date: Nov 08, 2022
Observation date: Sep 07, 2022
Submitted by: Ramava1026
Region: Ferry County, Washington, United States
Verified by: davidwdroppers
Verified date: Oct 18, 2022
Observation date: May 26, 2018
Submitted by: Oreo
Region: Shasta County, California, United States
Verified by: mcduck
Verified date: Oct 08, 2022
Observation date: Jun 11, 2018
Submitted by: Apha1a
Region: Humboldt County, California, United States
Verified by: mcduck
Verified date: Sep 19, 2022
Observation date: May 12, 2020
Submitted by: Veronica18
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 10, 2022
Observation date: Jun 29, 2022
Submitted by: kpiwor
Region: Pierce County, Washington, United States
Verified by: davidwdroppers
Verified date: Aug 30, 2022
Observation date: Jul 05, 2022
Submitted by: SandraBrull
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: Jul 17, 2022
Observation date: Jun 20, 2022
Submitted by: bozze
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: Jun 21, 2022
Observation date: Mar 12, 2018
Submitted by: klmarshall
Region: Marin County, California, United States
Verified by: ishaan2009
Verified date: Jun 12, 2022
Observation date: Mar 20, 2018
Submitted by: lincolnsallen@g...
Region: San Mateo County, California, United States
Verified by: ishaan2009
Verified date: Jun 12, 2022
Observation date: Apr 03, 2018
Submitted by: IronHogRider
Region: Los Angeles County, California, United States
Verified by: ishaan2009
Verified date: Jun 12, 2022
Observation date: Apr 11, 2018
Submitted by: J.C.Gonzalez
Region: Tuolumne County, California, United States
Verified by: ishaan2009
Verified date: Jun 12, 2022
Observation date: Apr 28, 2018
Submitted by: sandraandtaylor...
Region: San Diego County, California, United States
Verified by: ishaan2009
Verified date: Jun 12, 2022
Observation date: Jan 08, 2019
Submitted by: Santee Carol
Region: San Diego County, California, United States
Verified by: mcduck
Verified date: Jun 06, 2022
Observation date: Apr 11, 2019
Submitted by: Mlevy13
Region: Napa County, California, United States
Verified by: mcduck
Verified date: Jun 05, 2022
Observation date: Apr 22, 2019
Submitted by: alwellwells
Region: Santa Cruz County, California, United States
Verified by: mcduck
Verified date: Jun 03, 2022
Observation date: Apr 26, 2019
Submitted by: Kristina65
Region: El Dorado County, California, United States
Verified by: mcduck
Verified date: Jun 03, 2022
Observation date: Apr 27, 2019
Submitted by: themotherload
Region: El Dorado County, California, United States
Verified by: mcduck
Verified date: Jun 03, 2022
Observation date: May 06, 2019
Submitted by: Laughinglara
Region: Nevada County, California, United States
Verified by: mcduck
Verified date: Jun 03, 2022
Observation date: May 12, 2019
Submitted by: Drmmrg
Region: Yuba County, California, United States
Verified by: mcduck
Verified date: Jun 01, 2022
Observation date: May 28, 2019
Submitted by: SidheSprite
Region: Humboldt County, California, United States
Verified by: mcduck
Verified date: May 31, 2022
Observation date: Apr 09, 2022
Submitted by: Suzy mack
Region: El Dorado County, California, United States
Verified by: mcduck
Verified date: May 30, 2022
Observation date: May 26, 2022
Submitted by: Vickie J Anderson
Region: Mason County, Washington, United States
Verified by: davidwdroppers
Verified date: May 29, 2022
Observation date: May 28, 2022
Submitted by: EmJCray0nEater
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: May 29, 2022
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