Attributes of Hemileuca eglanterina

Western sheepmoth
Hemileuca eglanterina (Boisduval, 1852)

Family: Saturniidae
Subfamily: Hemileucinae
Identification: Highly variable. Upperside of forewing is yellow-orange to cream to pink with black markings. Upperside of hindwing is yellow-orange to orange with narrow to wide black markings. Form denudata (northwestern Wyoming west to Washington, south through the Central Valley of California) has no markings on either wing. Subspecies shastaensis (northern California and southern Oregon) has a pink forewing with diffuse black markings or is mostly black with some pink spots.
Wing Span: 2 9/16 - 3 7/16 inches (6.5 - 8.7 cm).
Life History: Adults emerge in early morning and mate in late morning. Females lay eggs in rings on plant stems. Eggs overwinter and hatch in April and May. Young caterpillars feed together in groups and when they are older they feed alone. Fully-grown caterpillars pupate in loose cocoons in the leaf litter or in burrows in soft soil, and adults emerge from July-September. At high elevations and northern latitudes, 2 years are needed to complete development. The cocoons overwinter and in the spring the adults emerge and start the cycle again.
Flight: One brood from June-September.
Caterpillar Hosts: Mountain lilac (Ceanothus), mountain-mahogany (Cercocarpus montanus), bitter cherry (Prunus emarginata), bitterbrush (Purshia tridentata), snowberry (Symphoricarpos), currant (Ribes), wild rose (Rosa), willow (Salix) and others.
Adult Food: Adults do not feed.
Habitat: From sea level to at least 8400 feet in a variety of habitats including chaparral, pine and redwood forests, oak woodlands, and riparian areas.
Range: Southeastern Alberta west to Vancouver Island, British Columbia; south to central Montana, Wyoming, central Colorado, northern Arizona, and southern California.
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:

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Observation Date Submitter Region Verified Datesort icon
July 19, 2016 revillamonkey Missoula County, Montana, United States July 26, 2016 Details
May 19, 2016 matthewjcampbell Umatilla County, Oregon, United States July 11, 2016 Details
June 24, 2016 yauchzee Clearwater County, Idaho, United States June 28, 2016 Details
August 04, 2015 indigogolf British Columbia, Canada October 05, 2015 Details
August 16, 2015 Kurt R. Schwarz Tuolumne County, California, United States September 10, 2015 Details
July 24, 2015 Phoenix94 Tooele County, Utah, United States July 25, 2015 Details
July 06, 2015 djsmith85 Kootenai County, Idaho, United States July 12, 2015 Details
June 28, 2015 Francine Padilla Sonoma County, California, United States June 30, 2015 Details
July 19, 2013 chreliot Powell County, Montana, United States June 21, 2015 Details
May 17, 2015 Duckdave14 Sonoma County, California, United States May 19, 2015 Details
July 08, 2014 SarcasticNash Clearwater County, Idaho, United States January 28, 2015 Details
August 01, 2014 THOTH6103 Boundary County, Idaho, United States January 28, 2015 Details
August 08, 2014 jellis Alpine County, California, United States August 12, 2014 Details
July 05, 2014 markshibalov British Columbia, Canada August 10, 2014 Details
July 13, 2014 dominique.eghlidi Lane County, Oregon, United States July 26, 2014 Details
July 19, 2014 davidmaerzke Los Angeles County, California, United States July 21, 2014 Details
July 12, 2014 iamchickaddd Los Angeles County, California, United States July 14, 2014 Details
July 10, 2014 Supernaturalmom4 Plumas County, California, United States July 13, 2014 Details
June 26, 2014 randimal Kittitas County, Washington, United States June 29, 2014 Details
June 01, 2014 matthewjcampbell Umatilla County, Oregon, United States June 11, 2014 Details
August 12, 2011 coreyk Clark County, Nevada, United States June 06, 2014 Details
May 29, 2014 Samuel Grijalva Solano County, California, United States May 30, 2014 Details
August 27, 2011 KLongstaff Monterey County, California, United States March 03, 2014 Details
August 25, 2008 KLongstaff Monterey County, California, United States February 11, 2014 Details
August 06, 2006 czaplak Teton County, Wyoming, United States January 06, 2014 Details
June 22, 2013 davidwdroppers Okanogan County, Washington, United States December 16, 2013 Details
August 28, 2011 diwalks2 San Diego County, California, United States December 14, 2013 Details
May 15, 2013 Stan Dryden Monterey County, California, United States November 15, 2013 Details
June 09, 2013 shaz Sonoma County, California, United States November 15, 2013 Details
July 03, 2013 OpheliaN Mendocino County, California, United States November 15, 2013 Details
May 19, 2012 Robert Gorman San Diego County, California, United States November 15, 2013 Details
September 01, 2011 Ethan Hall Morgan County, Utah, United States October 01, 2013 Details
August 04, 2013 Junebug Kittitas County, Washington, United States August 19, 2013 Details
July 13, 2013 plex1ppus Spokane County, Washington, United States July 30, 2013 Details
July 17, 2013 Robert Domenech Lewis And Clark County, Montana, United States July 17, 2013 Details
June 26, 2013 PDunwiddie Thurston County, Washington, United States July 04, 2013 Details
June 12, 2013 Jdammarell Pend Oreille County, Washington, United States June 20, 2013 Details
June 19, 2012 amdurso Cache County, Utah, United States October 30, 2012 Details
August 07, 2010 opiliones Clark County, Nevada, United States October 18, 2012 Details
August 15, 2012 seaugust Monterey County, California, United States September 11, 2012 Details
July 27, 2012 tfurman Thurston County, Washington, United States August 09, 2012 Details
July 07, 2012 eal79 Inyo County, California, United States August 06, 2012 Details
July 22, 2012 Virginia Rivers Sierra County, California, United States August 02, 2012 Details
July 27, 2010 lancaster.cdy Teton County, Wyoming, United States July 17, 2012 Details
July 30, 2011 Ethan Hall Salt Lake County, Utah, United States July 08, 2012 Details
July 04, 2012 plex1ppus Spokane County, Washington, United States July 07, 2012 Details
August 16, 2011 jr.berry Shasta County, California, United States June 21, 2012 Details
July 29, 2011 iceix Teton County, Wyoming, United States March 04, 2012 Details
July 09, 2010 bright Glacier County, Montana, United States February 21, 2012 Details
July 22, 2006 pcastrovillo Valley County, Idaho, United States January 29, 2012 Details