Edith's Checkerspot Euphydryas editha (Boisduval, 1852)

Family: Nymphalidae

Subfamily: Nymphalinae

Identification: Variable. Front wing rounded at tip. Upperside is black with red and pale yellow or white bands. Submarginal band of small yellow or white spots; wide postmedian band is red. Underside of hindwing with alternating bands of yellow-orange and cream.

Wing Span: 1 1/4 - 2 inches (3.2 - 5.1 cm).

Life History: Males perch or patrol all day to find females. Eggs are laid in groups on underside of leaves or on flowers of the host plant. Caterpillars eat leaves and flowers; sometimes using different host plants before and after hibernation. Young caterpillars live in loose silk webs; third- and fourth-stage caterpillars hibernate.

Flight: One brood; from March-May at low elevations, June-August at high elevations and in the north.

Caterpillar Hosts: Various species of paintbrush (Castilleja), beardtongues (Penstemon), lousewort (Pedicularis), owl's clover (Orthocarpus), Chinese houses (Collinsia), and plantain (Plantago).

Adult Food: Flower nectar.

Habitat: From sea level to treeline through diverse habitats including coastal chaparral, meadows, fields, foothills, open woods, alpine fellfields.

Range: Southern British Columbia and Alberta south to Baja California, Nevada, Utah, and Colorado.

Conservation: Two subspecies, the Bay Checkerspot (Euphydryas editha bayensis) and the Quino Checkerspot (E. e. quino) are listed as endangered under the Endangered Species Act of 1973.

NCGR: The bay checkerspot (subspecies bayensis) has The Nature Conservancy Global Rank of T1 - Critically imperiled because of extreme rarity (5 or fewer occurrences, or very few remaining individuals), or because of some factor of its biology making it especially vulnerable to extinction. (Critically endangered throughout its range). The other subspecies of Euphydryas editha have The Nature Conservancy Global Rank of G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.

Management Needs: Protect remaining habitat from development and alteration. Refer to Fish & Wildlife Service recovery plans.

BAMONA Shop

Check out our new Fall 2025 Classic BAMONA Logo Shirts and cozy Native Plants Hoodies!

Please donate!

We depend on donations to keep Butterflies and Moths of North America freely available. We want to express our gratitude to all who showed their support by making a contribution this year. You can donate to support this project at any time.

Advertise with us!

Do you have a product or service that you think would interest BAMONA users? If you would like to advertise on this website, contact us by email, or use the contact form and select the "Advertising" category.

Verified Sightings

Displaying 577 - 600 of 798 verified sightings

Filter by Region

Observation date: unknown

Submitted by: legacy.reporter

Region: Sweet Grass County, Montana, United States

Verified by: legacy.verifier

Verified date: Dec 31, 2004

Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Please donate!

Advertise with us!

Verified Sightings

Advertisement

Edith's Checkerspot
Euphydryas editha (Boisduval, 1852)