Species Detail

Lupine Blue

Plebejus lupini (Boisduval, 1869)

JPG -- species photo

Attributes of Plebejus lupini


Family: Gossamer-wing Butterflies (Lycaenidae)

Subfamily: Blues (Polyommatinae)

Identification: Upperside of male lilac blue with wide dark borders; female dark brown. Band at hindwing outer margin wide, orange-red, in male may be divided into separate chevrons.

Life history: Males patrol near the host plants for females. Eggs are laid singly on flowers, which the caterpillars eat. Second-stage caterpillars hibernate.

Flight: In the Sierra Nevada of California, one flight from June-August; elsewhere, several flights from March-July.

Wing span: 7/8 - 1 1/8 inches (2.2 - 2.9 cm).

Caterpillar hosts: Several species of perennial wild buckwheat including sulfur flower (Eriogonum umbellatum) and flat top (Eriogonum fasciculatum) in the buckwheat family (Polygonaceae).

Adult food: Flower nectar.

Habitat: Alpine slopes, mountain meadows and slopes, prairies, rocky outcrops, chaparral, and sagebrush.

Range: Southwestern Canada south through much of mountainous and intermountain West and high plains to northern Mexico.

Conservation: Several populations, some unnamed, are highly local, and are of conservation concern.

NatureServe Global Status: G4 - Apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery.

Management needs: Monitor status of populations, conserve habitats, and be vigilant for effects of exotic weeds.

Documented Records for Plebejus lupini



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