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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The map below displays all verified sighting records in the BAMONA database for this species. Each record is indicated with a yellow dot. The orange dots on the map provide access to information about the 400 most recently verified sightings of this species. In some instances, there are several records at the same location. Use the table view to access these records.
Instructions: Click on the map and move your mouse to pan.
Zoom by using the plus [+] and minus [-] on the left side of the map.
To change which map layers are displayed, click on the plus sign [+] on the right side of the map.
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.
| Observation Date | Submitter | Region |
Verified Date |
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June 03, 2013 | matthewjcampbell | Umatilla County, Oregon, United States | June 18, 2013 | Details |
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June 06, 2013 | francesberg | Clark County, Washington, United States | June 07, 2013 | Details |
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May 29, 2013 | Radley521 | Ravalli County, Montana, United States | June 05, 2013 | Details |
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May 29, 2013 | Heath Armstrong | British Columbia, Canada | June 03, 2013 | Details |
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May 31, 2013 | abaird | Island County, Washington, United States | June 03, 2013 | Details |
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May 29, 2013 | synaptic | Kootenai County, Idaho, United States | June 01, 2013 | Details |
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May 29, 2013 | almapach | Ravalli County, Montana, United States | May 31, 2013 | Details |
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May 27, 2013 | brightwings | Idaho, United States | May 28, 2013 | Details |
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May 17, 2013 | kmayhew | British Columbia, Canada | May 20, 2013 | Details |
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May 15, 2013 | campbell0607 | Pierce County, Washington, United States | May 17, 2013 | Details |
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May 11, 2013 | schnate124 | British Columbia, Canada | May 16, 2013 | Details |
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May 10, 2013 | Judith Hadley | British Columbia, Canada | May 11, 2013 | Details |
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March 11, 2013 | philipnott | Marin County, California, United States | May 09, 2013 | Details |
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March 23, 2013 | jpaquay | Santa Cruz County, California, United States | May 09, 2013 | Details |
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April 11, 2013 | Coty | San Diego County, California, United States | May 09, 2013 | Details |
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April 12, 2013 | frisbeebug | Los Angeles County, California, United States | May 09, 2013 | Details |
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May 04, 2013 | carly mcneil | Hood River County, Oregon, United States | May 09, 2013 | Details |
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May 01, 2013 | katielippus | Santa Cruz County, California, United States | May 09, 2013 | Details |
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May 07, 2013 | kfukuda | Douglas County, Oregon, United States | May 09, 2013 | Details |
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May 02, 2013 | swirrrly | Thurston County, Washington, United States | May 04, 2013 | Details |
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March 16, 2013 | miltnerunit | Marin County, California, United States | April 30, 2013 | Details |
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April 01, 2013 | catahstrophic | Los Angeles County, California, United States | April 30, 2013 | Details |
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March 31, 2013 | sbratset | Calaveras County, California, United States | April 30, 2013 | Details |
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April 03, 2013 | Dustmop | Amador County, California, United States | April 30, 2013 | Details |
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April 05, 2013 | kDub514 | Monterey County, California, United States | April 30, 2013 | Details |
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April 05, 2013 | josh323 | Los Angeles County, California, United States | April 30, 2013 | Details |
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May 17, 2012 | sobrien | Shasta County, California, United States | April 30, 2013 | Details |
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April 01, 2013 | Alex Sherer | San Diego County, California, United States | April 30, 2013 | Details |
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April 18, 2013 | Gckels | Mendocino County, California, United States | April 30, 2013 | Details |
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April 21, 2013 | susanryan121 | Contra Costa County, California, United States | April 30, 2013 | Details |
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April 18, 2013 | K-School Kids | Curry County, Oregon, United States | April 30, 2013 | Details |
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April 25, 2013 | bluekitty76 | San Diego County, California, United States | April 30, 2013 | Details |
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March 19, 2013 | ingrid.rojas | San Mateo County, California, United States | March 23, 2013 | Details |
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March 02, 2013 | AnnieOakleyM107 | Ventura County, California, United States | March 20, 2013 | Details |
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March 10, 2013 | LemmonLizard | San Diego County, California, United States | March 20, 2013 | Details |
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March 11, 2013 | smidebra | Lake County, California, United States | March 20, 2013 | Details |
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March 15, 2013 | ahagan | Sonoma County, California, United States | March 20, 2013 | Details |
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May 21, 2012 | chokozi | British Columbia, Canada | February 25, 2013 | Details |
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January 18, 2013 | ravila | Santa Cruz County, California, United States | January 23, 2013 | Details |
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June 19, 2012 | Dinoman | Nevada County, California, United States | October 25, 2012 | Details |
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May 11, 2012 | Suckafish | San Diego County, California, United States | September 11, 2012 | Details |
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May 30, 2012 | Girlscout | Tehama County, California, United States | August 02, 2012 | Details |
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June 27, 2012 | jkasper46 | Marin County, California, United States | July 05, 2012 | Details |
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May 14, 2012 | edielepew | Lincoln County, Oregon, United States | June 19, 2012 | Details |
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June 16, 2012 | bethann69 | Deschutes County, Oregon, United States | June 19, 2012 | Details |
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June 09, 2012 | serenaleblond | British Columbia, Canada | June 12, 2012 | Details |
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February 05, 2012 | Have a chill day | California, United States | June 06, 2012 | Details |
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May 24, 2012 | jwaldrop | San Luis Obispo County, California, United States | June 05, 2012 | Details |
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June 02, 2012 | ita | King County, Washington, United States | June 04, 2012 | Details |
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May 04, 2012 | lfleming99 | Mono County, California, United States | May 31, 2012 | Details |
