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
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Hyalophora euryalus - Hyalophora_euryalusFranco1.jpg
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Hyalophora euryalus - Hyalophora_euryalusSanders.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:
1. All records (yellow dots)   2. Recently verified records (orange dots)*   3. US county records (purple)

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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
June 05, 2016 Pleek British Columbia, Canada July 28, 2016 Details
May 28, 2016 jdgold Yakima County, Washington, United States June 21, 2016 Details
June 11, 2016 spodan Stevens County, Washington, United States June 13, 2016 Details
May 22, 2016 Romeo9 British Columbia, Canada June 03, 2016 Details
June 01, 2016 gregwebster British Columbia, Canada June 02, 2016 Details
May 19, 2016 mdclefebvre British Columbia, Canada May 30, 2016 Details
May 27, 2016 bkujala British Columbia, Canada May 29, 2016 Details
April 21, 2016 fbenross San Mateo County, California, United States May 27, 2016 Details
May 25, 2016 tobymayo British Columbia, Canada May 26, 2016 Details
May 18, 2016 carlysummer Adams County, Idaho, United States May 23, 2016 Details
May 15, 2016 Katecaponi Cowlitz County, Washington, United States May 15, 2016 Details
May 15, 2016 Lakebutterflys Pend Oreille County, Washington, United States May 15, 2016 Details
May 05, 2016 Eric Wickham British Columbia, Canada May 10, 2016 Details
May 09, 2016 Deborah McKinley British Columbia, Canada May 10, 2016 Details
May 06, 2016 TChandelle British Columbia, Canada May 09, 2016 Details
May 07, 2016 jdavies British Columbia, Canada May 09, 2016 Details
May 06, 2016 spinedr British Columbia, Canada May 09, 2016 Details
May 02, 2016 05e3504x4 British Columbia, Canada May 04, 2016 Details
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