Edith'S Checkerspot

euphydryas editha

Edith's Checkerspot (Euphydryas editha) is a fascinating and highly studied butterfly native to western North America. Renowned for its complex population structures and its sensitivity to environmental shifts, this species has become a famous indicator for the ecological impacts of global climate change. With dozens of recognized subspecies—some of which are federally endangered—it occupies a wide range of habitats, from coastal chaparral to alpine meadows. What makes Edith's Checkerspot particularly remarkable is its extreme local specialization. Different populations rely on completely different host plants, leading to a patchwork of highly localized ecotypes. This butterfly exhibits incredible evolutionary agility, sometimes adapting to entirely new introduced host plants within just a few generations, making it a living laboratory for evolutionary biologists.

Habitat: Found in diverse environments ranging from coastal sage scrub and chaparral to alpine meadows and fell-fields, strictly where their specific larval host plants flourish.

Appearance

The adult butterfly features a stunning and intricate checkered pattern on its wings, composed of contrasting bands of black, vibrant orange or brick-red, and pale cream or white spots. The dorsal wing surfaces are typically darker with more prominent black outlines separating the colorful cells, while the ventral sides are brighter and more uniformly checkered, aiding in camouflage when the wings are closed. The body is dark, somewhat hairy, and typically measures about 1 to 2 centimeters long, supporting a wingspan that ranges from 3 to 5 centimeters. Subspecies can vary significantly in the exact hue, size, and proportion of red to yellow spots.

KingdomAnimaliaPhylumArthropodaClassInsectaOrderLepidopteraFamilyNymphalidaeGenusEuphydryas

Edith'S Checkerspot

Interesting facts

Because they are relatively weak fliers, populations often remain highly localized and isolated, which has led to the evolution of over 20 distinct subspecies across their geographic range.

Edith's Checkerspot is one of the most thoroughly studied insects in the context of climate change, providing some of the earliest definitive evidence that species were shifting their ranges in response to a warming planet.

In Nevada, one population of this butterfly completely switched its preferred host plant from a native species to an introduced European weed within just over a decade, showcasing incredibly rapid evolution.

Special abilities

Populations have famously demonstrated geographic range shifts, naturally migrating northward and to higher elevations over decades in response to global warming.

Females possess the remarkable ability to rapidly evolve egg-laying preferences, adapting to invasive or novel host plants in just a few years.

Caterpillars can enter a state of suspended animation known as diapause to survive long, hot, dry summers when their host plants wither away.

Measurements & details

Length: 1-2 cm
Wingspan: 3-5 cm
Weight: 0.0001-0.0005 kg
Lifespan: 1 years
Top Speed: 15 km/h
Clutch Size: 20-250
Incubation: 7-14 days

Diet & Feeding

Caterpillars are obligate herbivores that feed on specific host plants, while adults are nectarivores that consume liquid nectar from flowering plants.

Age differences: Larvae strictly consume the foliage of specific host plants, whereas adults transition to consuming liquid nectar from a variety of nearby blooming flowers.

Primary Foods

Dwarf Plantain
Purple Owl's Clover
Chinese Houses
Flower Nectar

Foraging Method

Foraging

Ecological connections

host plant

Dwarf Plantain

Plantago erecta

Primary larval host plant for many coastal populations.

host plant

Purple Owl's Clover

Castilleja exserta

Primary larval host plant for several montane and southern populations.

eaten by

Western Fence Lizard

Sceloporus occidentalis

Common predator that hunts adult butterflies resting on rocks.

parasite

Braconid Wasps

Cotesia spp.

Parasitic wasps that lay their eggs inside the checkerspot's caterpillars.

Traits

No trait badges are assigned for this object yet.

Also known as

No aliases listed yet.

Collections

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Safety

Danger

1/5 · Very low

No special safety notes yet.

Frequently Asked Questions

How to identify Edith'S Checkerspot?

The easiest way to identify Edith'S Checkerspot is to use the Snappit nature identifier app.

How long is Edith'S Checkerspot?

1-2 cm

What is Edith'S Checkerspot's wingspan?

3-5 cm

How much does Edith'S Checkerspot weigh?

0.0001-0.0005 kg

How long does Edith'S Checkerspot live?

1 years

How fast can Edith'S Checkerspot move?

15 km/h

What does Edith'S Checkerspot eat?

Caterpillars are obligate herbivores that feed on specific host plants, while adults are nectarivores that consume liquid nectar from flowering plants.

Where is Edith'S Checkerspot usually found?

Found in diverse environments ranging from coastal sage scrub and chaparral to alpine meadows and fell-fields, strictly where their specific larval host plants flourish.