Attributes of Euphydryas chalcedona

Chalcedon Checkerspot
Euphydryas chalcedona (Doubleday, [1847])

Family: Nymphalidae
Subfamily: Nymphalinae
Identification: Extremely variable. Forewing narrow. Upperside is black to dark orange-brown with yellow, red, and sometimes white spots. Underside with yellow and orange-red bands.
Wing Span: 1 1/4 - 2 1/4 inches (3.2 - 5.7 cm).
Life History: Males perch or patrol all day for females. Eggs are laid in large groups on underside of leaves of host plants. Caterpillars feed together on leaves, flowers, or bracts in a silk nest. Third- and fourth-stage caterpillars hibernate under rocks or in litter. Caterpillars in high elevations can hibernate for several years.
Flight: One flight; April-June in California and Oregon, June-July in the north and higher elevations. Several flights from April-October in western Arizona, southern Nevada, and the Mojave Desert.
Caterpillar Hosts: Besseya, penstemon, and Indian paintbrush (Scrophulariaceae); snowberry and honeysuckle (Caprifoliaceae); and plants from several other families including Boraginaceae and Rosaceae.
Adult Food: Flower nectar.
Habitat: Sagebrush flats, chaparral, desert hills, high prairie, open forest, alpine tundra.
Range: Alaska south along the Pacific Coast through California and Arizona to Baja California and Mexico; east to Montana, the Dakotas, Wyoming, Colorado, New Mexico.
Conservation: Some subspecies and unnamed populations may require monitoring, management, or preservation.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: Maintain habitat integrity, host plant colonies, and nectar sources. Note: This species used to include these additional separate species Euphydryas anicia, E. chalcedona, and E. colon.
Taxonomy Notes:

Images of Euphydryas chalcedona

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Euphydryas chalcedona - euphydryas_chalcedona_kingstonensis_caterpillar6_raisingbutterflies.jpg

Euphydryas chalcedona - euphydryas_chalcedona_kingstonensis_caterpillar6_raisingbutterflies.jpg
Euphydryas chalcedona - euphydryas_chalcedona_kingstonensis_caterpillar2_raisingbutterflies.jpg

Euphydryas chalcedona - euphydryas_chalcedona_kingstonensis_caterpillar2_raisingbutterflies.jpg
Euphydryas chalcedona - euphydryas_chalcedona_kingstonensis_caterpillar3_raisingbutterflies.jpg

Euphydryas chalcedona - euphydryas_chalcedona_kingstonensis_caterpillar3_raisingbutterflies.jpg
Euphydryas chalcedona - IMG_7040.jpg

Euphydryas chalcedona - IMG_7040.jpg
Euphydryas chalcedona - Euphydryas_chalcedonaRiedel.jpg

Euphydryas chalcedona - Euphydryas_chalcedonaRiedel.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)

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
June 30, 2013 plex1ppus Pend Oreille County, Washington, United States April 24, 2014 Details
April 14, 2013 icosahedron Sonoma County, California, United States January 17, 2014 Details
March 24, 2013 diwalks2 San Bernardino County, California, United States December 20, 2013 Details
March 31, 2012 Robert Gorman San Diego County, California, United States November 27, 2013 Details
March 23, 2013 Robert Gorman San Bernardino County, California, United States October 30, 2013 Details
March 23, 2013 Robert Gorman San Bernardino County, California, United States October 30, 2013 Details
June 29, 2012 BillBradford Umatilla County, Oregon, United States October 08, 2013 Details
June 29, 2012 BillBradford Umatilla County, Oregon, United States October 08, 2013 Details
June 18, 2011 rebeccafm Los Angeles County, California, United States July 18, 2013 Details
June 06, 2013 Josiah Gilbert San Luis Obispo County, California, United States July 14, 2013 Details
May 27, 2013 shakespearenut Los Angeles County, California, United States May 28, 2013 Details
April 18, 2013 wimvdam Santa Barbara County, California, United States May 15, 2013 Details
May 15, 2009 Jamie Chavez Santa Barbara County, California, United States May 05, 2013 Details
April 26, 2013 Jamie Chavez Santa Barbara County, California, United States May 05, 2013 Details
April 10, 2013 MAKI Santa Barbara County, California, United States May 02, 2013 Details
April 28, 2013 vmcintee Contra Costa County, California, United States April 29, 2013 Details
April 20, 2013 kahunamcginty Alameda County, California, United States April 29, 2013 Details
July 10, 1982 legacy.reporter (K Hansen-S. Mattoon) Elko County, Nevada, United States December 01, 2012 Details
July 10, 1982 legacy.reporter (K Hansen-S. Mattoon) Elko County, Nevada, United States December 01, 2012 Details
June 29, 1987 legacy.reporter (George T. Austin) Humboldt County, Nevada, United States December 01, 2012 Details
July 11, 1995 legacy.reporter (Robert L. Langston) Douglas County, Nevada, United States December 01, 2012 Details
July 10, 1995 legacy.reporter (Robert L. Langston) Storey County, Nevada, United States December 01, 2012 Details
April 14, 1999 legacy.reporter (Ray Stanford) Navajo County, Arizona, United States December 01, 2012 Details
March 14, 2004 legacy.reporter (Mark Walker) Maricopa County, Arizona, United States December 01, 2012 Details
June 11, 2008 mojoedevine Alameda County, California, United States August 22, 2012 Details
May 28, 2012 shakespearenut Los Angeles County, California, United States May 30, 2012 Details
May 21, 2012 evilrobot42 Santa Clara County, California, United States May 27, 2012 Details
May 27, 2012 Whitedolphinstar Los Angeles County, California, United States May 27, 2012 Details
May 23, 2012 Cabngirl Sonoma County, California, United States May 25, 2012 Details
April 27, 2012 cpohlson Fresno County, California, United States May 03, 2012 Details
March 11, 2012 AKimages San Diego County, California, United States March 20, 2012 Details
May 28, 2012 legacy.reporter (Ray Bruun) Nevada, United States January 01, 2012 Details
July 08, 1978 legacy.reporter (George T. Austin) Elko County, Nevada, United States January 01, 2012 Details
March 21, 1976 legacy.reporter (Ken Hansen) Mohave County, Arizona, United States January 01, 2012 Details
July 04, 1980 legacy.reporter (George T. Austin) Elko County, Nevada, United States January 01, 2012 Details
August 19, 1979 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
April 15, 1978 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
April 08, 1977 legacy.reporter (C. S. Lawson) Clark County, Nevada, United States January 01, 2012 Details
April 15, 1978 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
May 03, 1978 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
April 12, 1978 legacy.reporter (unknown) Clark County, Nevada, United States January 01, 2012 Details
April 15, 1978 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
April 20, 1978 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
April 22, 1979 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
May 12, 1978 legacy.reporter (George T. Austin) Clark County, Nevada, United States January 01, 2012 Details
March 11, 2011 RaisingButterflies.org Clark County, Nevada, United States October 19, 2011 Details
April 25, 2010 RaisingButterflies.org Mohave County, Arizona, United States October 19, 2011 Details
July 22, 2011 ABroadwell San Mateo County, California, United States July 29, 2011 Details
June 05, 2011 scheidr Los Angeles County, California, United States July 08, 2011 Details
July 02, 2011 Alamaden Santa Clara County, California, United States July 04, 2011 Details