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
January 01, 1950 legacy.reporter Alaska, United States December 31, 2004 Details
January 01, 1950 legacy.reporter La Paz County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Yuma County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Mohave County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Coconino County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Coconino County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Navajo County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Pinal County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Pima County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Yavapai County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Gila County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Maricopa County, Arizona, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Alameda County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Alpine County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Amador County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Butte County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Calaveras County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Colusa County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Contra Costa County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Del Norte County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter El Dorado County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Fresno County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Glenn County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Humboldt County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Inyo County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Kern County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Kings County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Lake County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Lassen County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Los Angeles County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Madera County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Marin County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Mariposa County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Mendocino County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Merced County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Modoc County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Mono County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Monterey County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Napa County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Nevada County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Orange County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Placer County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Plumas County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Riverside County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter Sacramento County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter San Benito County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter San Bernardino County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter San Diego County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter San Francisco County, California, United States December 31, 2004 Details
January 01, 1950 legacy.reporter San Joaquin County, California, United States December 31, 2004 Details