Attributes of Hyalophora euryalus

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.
Taxonomy Notes:

Images of Hyalophora euryalus

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Hyalophora euryalus - Hyalophora_euryalus_mating-Ferdi-Businger-crop.jpg

Hyalophora euryalus - Hyalophora_euryalus_mating-Ferdi-Businger-crop.jpg
Hyalophora euryalus - Hyalophora_euryalus-Ferdi-Businger-crop.jpg

Hyalophora euryalus - Hyalophora_euryalus-Ferdi-Businger-crop.jpg
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Hyalophora euryalus - Hyalophora_euryalusFranco1.jpg
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Hyalophora euryalus - Hyalophora_euryalusSanders.jpg

Hyalophora euryalus - Hyalophora_euryalusSanders.jpg
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Hyalophora euryalus - Hyalophora_euryalusSanders2.jpg
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Hyalophora euryalus - Hyalophora_euryalusSanders3.jpg

The map below displays all BAMONA data for this species and has three different data layers:
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*The orange dots on the map provide access to information about the 400 most recently verified sightings of this species. Sometimes, there are several records at the same location. Use the table view to access these records.

By default, the fifty most recently verified sightings are below. Sort by Observation Date to see the most recent sightings, or filter the sightings by region to get a regional list.

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Observation Date Submitter Region Verified Datesort icon
April 10, 2016 mdenny British Columbia, Canada April 22, 2016 Details
April 15, 2016 AuntieRaRa California, United States April 21, 2016 Details
April 19, 2016 TheLazyDog343 Clark County, Washington, United States April 21, 2016 Details
April 10, 2016 Danfrakes Washington County, Oregon, United States April 13, 2016 Details
March 27, 2016 suecarole Monterey County, California, United States April 12, 2016 Details
April 02, 2016 jcpolito Los Angeles County, California, United States April 12, 2016 Details
April 06, 2016 littlegabriella Los Angeles County, California, United States April 12, 2016 Details
October 28, 2015 dano5 San Mateo County, California, United States March 23, 2016 Details
March 18, 2016 amsmith Santa Cruz County, California, United States March 22, 2016 Details
March 08, 2016 doodles2048 Sonoma County, California, United States March 16, 2016 Details
March 09, 2016 cktrillium Santa Cruz County, California, United States March 16, 2016 Details
February 25, 2016 cindyb San Diego County, California, United States March 05, 2016 Details
February 25, 2016 dano5 San Mateo County, California, United States March 05, 2016 Details
February 23, 2016 dano5 San Mateo County, California, United States March 05, 2016 Details
March 04, 2016 akroche Napa County, California, United States March 05, 2016 Details
March 04, 2016 LKM San Mateo County, California, United States March 05, 2016 Details
March 05, 2016 trefzro Napa County, California, United States March 05, 2016 Details
August 08, 2014 4oclockwatch San Juan County, Washington, United States March 01, 2016 Details
July 02, 2006 klebo Tulare County, California, United States February 27, 2016 Details
June 05, 2013 4oclockwatch San Juan County, Washington, United States February 25, 2016 Details
April 21, 2015 angieinacan Boise County, Idaho, United States September 08, 2015 Details
July 17, 2015 D. Boulian Mendocino County, California, United States July 20, 2015 Details
June 06, 2015 steves Pend Oreille County, Washington, United States July 07, 2015 Details
May 18, 2015 jacqueline.frei@mosaic.com British Columbia, Canada June 10, 2015 Details
June 07, 2015 DrPill Missoula County, Montana, United States June 10, 2015 Details
May 20, 2015 Gandolf British Columbia, Canada June 02, 2015 Details
May 26, 2015 davidjhurd British Columbia, Canada May 30, 2015 Details
May 22, 2015 schamberlin Stevens County, Washington, United States May 25, 2015 Details
May 20, 2015 bella15 Kittitas County, Washington, United States May 22, 2015 Details
May 21, 2015 leahsandkuhl British Columbia, Canada May 22, 2015 Details
May 17, 2015 Murphy British Columbia, Canada May 19, 2015 Details
May 17, 2015 Nadiasureda El Dorado County, California, United States May 19, 2015 Details
May 07, 2015 g. mabrey Kootenai County, Idaho, United States May 10, 2015 Details
May 04, 2015 Marcie Callewaert British Columbia, Canada May 05, 2015 Details
April 29, 2015 Alariata Josephine County, Oregon, United States May 04, 2015 Details
April 28, 2015 Kathleen1 Plumas County, California, United States May 04, 2015 Details
April 30, 2015 blentztx Kootenai County, Idaho, United States May 01, 2015 Details
April 17, 2015 gloriannaj Lewis County, Washington, United States April 24, 2015 Details
April 16, 2015 ekitayama Jackson County, Oregon, United States April 17, 2015 Details
April 02, 2015 ccrider77 Ventura County, California, United States April 02, 2015 Details
March 28, 2015 wendell151 Thurston County, Washington, United States March 31, 2015 Details
March 12, 2015 marcydodson2011 Lane County, Oregon, United States March 14, 2015 Details
February 14, 2015 marcus7282 Santa Cruz County, California, United States March 13, 2015 Details
August 01, 2014 kevin.idaho Bonner County, Idaho, United States March 10, 2015 Details
February 13, 2015 rebeccarsr Santa Clara County, California, United States February 25, 2015 Details
February 21, 2015 gblake Sonoma County, California, United States February 21, 2015 Details
February 19, 2015 natalyajackson Santa Cruz County, California, United States February 19, 2015 Details
February 17, 2015 birchsap Sonoma County, California, United States February 18, 2015 Details
May 18, 2014 Rosemary Yocum Bonner County, Idaho, United States January 28, 2015 Details
May 29, 2014 priestlakestatepark Bonner County, Idaho, United States January 28, 2015 Details