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:
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There are also three base layers: 1. Satellite    2. Normal   3. Hybrid

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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
February 12, 2011 Lisa94 Santa Cruz County, California, United States July 09, 2014 Details
March 23, 2014 pamelaweston Baja California Norte, Mexico July 08, 2014 Details
June 24, 2014 lknegus Humboldt County, California, United States June 25, 2014 Details
June 14, 2014 marneyr Curry County, Oregon, United States June 15, 2014 Details
June 03, 2014 Doc Rockwell Trinity County, California, United States June 09, 2014 Details
May 31, 2014 Barbara McLeod British Columbia, Canada June 05, 2014 Details
May 28, 2014 sina78 Pierce County, Washington, United States May 31, 2014 Details
May 28, 2014 LC Okanogan County, Washington, United States May 29, 2014 Details
May 28, 2014 bg155 San Mateo County, California, United States May 28, 2014 Details
May 24, 2014 lunabluefarm Josephine County, Oregon, United States May 26, 2014 Details
May 16, 2014 mmcconvill British Columbia, Canada May 22, 2014 Details
May 20, 2014 kern9262 Okanogan County, Washington, United States May 22, 2014 Details
May 18, 2014 The Trooper San Bernardino County, California, United States May 22, 2014 Details
May 19, 2014 dawnr Nevada County, California, United States May 19, 2014 Details
May 03, 2012 ashmavon Humboldt County, California, United States May 15, 2014 Details
April 29, 2014 nafiwclw Josephine County, Oregon, United States May 05, 2014 Details
April 29, 2014 deligrl43 Clark County, Washington, United States May 03, 2014 Details
May 09, 2013 amandangreiner Deschutes County, Oregon, United States April 24, 2014 Details
June 03, 2013 j.fasana Washington County, Oregon, United States April 24, 2014 Details
May 27, 2013 matthewjcampbell Umatilla County, Oregon, United States April 21, 2014 Details
March 15, 2014 jsbutterflies1 Los Angeles County, California, United States March 20, 2014 Details
March 12, 2014 Susan Stienstra Shasta County, California, United States March 13, 2014 Details
March 09, 2014 jag2774 Calaveras County, California, United States March 10, 2014 Details
June 24, 2013 HaileyButterfly British Columbia, Canada March 08, 2014 Details
February 21, 2014 greyraven San Bernardino County, California, United States February 24, 2014 Details
February 03, 2014 Ericwxbee Ventura County, California, United States February 24, 2014 Details
February 21, 2014 sgenergee71 Santa Cruz County, California, United States February 22, 2014 Details
June 24, 2013 HaileyButterfly British Columbia, Canada January 24, 2014 Details
January 24, 2014 dpletcher Santa Cruz County, California, United States January 24, 2014 Details
January 14, 2014 Temescal Valley Preserve Riverside County, California, United States January 22, 2014 Details
June 29, 2012 butterfly88 Union County, Oregon, United States October 19, 2013 Details
March 20, 2013 shakespearenut Los Angeles County, California, United States October 01, 2013 Details
May 12, 2013 Belyeal California, United States October 01, 2013 Details
May 13, 2013 mollywahl Contra Costa County, California, United States October 01, 2013 Details
October 21, 2012 heaven Mendocino County, California, United States August 22, 2013 Details
June 28, 2013 acbc66 Marin County, California, United States June 30, 2013 Details
June 18, 2013 Hommestaad Clark County, Washington, United States June 20, 2013 Details
June 03, 2013 matthewjcampbell Umatilla County, Oregon, United States June 18, 2013 Details
June 06, 2013 francesberg Clark County, Washington, United States June 07, 2013 Details
May 29, 2013 Radley521 Ravalli County, Montana, United States June 05, 2013 Details
May 29, 2013 Heath Armstrong British Columbia, Canada June 03, 2013 Details
May 31, 2013 abaird Island County, Washington, United States June 03, 2013 Details
May 29, 2013 synaptic Kootenai County, Idaho, United States June 01, 2013 Details
May 29, 2013 almapach Ravalli County, Montana, United States May 31, 2013 Details
May 27, 2013 brightwings Idaho, United States May 28, 2013 Details
May 17, 2013 kmayhew British Columbia, Canada May 20, 2013 Details
May 15, 2013 campbell0607 Pierce County, Washington, United States May 17, 2013 Details
May 11, 2013 schnate124 British Columbia, Canada May 16, 2013 Details
May 10, 2013 Judith Hadley British Columbia, Canada May 11, 2013 Details
March 11, 2013 philipnott Marin County, California, United States May 09, 2013 Details