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Butterflies of Oklahoma -- Brephidium exile

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Butterflies of North America

Butterflies of Oklahoma

Western Pygmy-Blue (Brephidium exile)
JPG -- species photo

Western Pygmy-Blue (Brephidium exile [Boisduval])

Wing span: 1/2 - 3/4 inch (1.2 - 2 cm).

Identification: Tiny. Upperside copper brown with dull blue at the bases of both wings. Underside of hindwing is copper brown with white at the base; fringe mostly white; 3 small black spots near base; row of black spots at outer margin.

Life history: Males patrol over the host plants all day to find receptive females. Females lay eggs all over the host but particularly on the uppersides of leaves. Caterpillars eat all parts of the plant. Chrysalids hibernate.

Flight: July-September in the north, all year in South Texas.

Caterpillar hosts: Pigweed (Chenopodium album), saltbush species (Atriplex), and others in the goosefoot family (Chenopodiaceae).

Adult food: Flower nectar.

Habitat: Alkaline areas such as deserts, salt marshes, and wasteland.

Range: Common. Central California east to southern Nevada, central Arizona, central New Mexico, and west Texas. South through southern California, Baja California, and Mexico to Venezuela. Migrates to Arkansas, Nebraska, and Oregon.

Conservation: Not usually required.

The Nature Conservancy Global Rank: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.

Management needs: None reported.

References:

Opler, P. A. and G. O. Krizek. 1984. Butterflies east of the  Great Plains. Johns 
    Hopkins University Press, Baltimore. 294 pages, 54 color plates.

Opler, P. A. and V. Malikul. 1992. A field guide to eastern  butterflies. Peterson 
    field guide #4. Houghton-Mifflin Co.,  Boston. 396 pages, 48 color plates.

Scott, J. A. 1986. The butterflies of North America. Stanford  University Press, 
    Stanford, Calif. 583 pages, 64 color plates.

Tilden, J. W. 1986. A field guide to western butterflies.  Houghton-Mifflin Co., 
    Boston, Mass. 370 pages, 23 color plates.

Author: Jane M. Struttmann

State and Regional References:

Opler, Paul A. 1999. Peterson Field Guide to Western Butterflies, revised 
     edition. Houghton Mifflin Co., Boston, Mass.

Stanford, R.E. and P.A. Opler. 1993. Atlas of Western USA Butterflies. 
     Privately published, Denver, Colo. 

Tilden, J.W. and A.C. Smith. 1986. A Field Guide to Western Butterflies. 
     Houghton Mifflin Co., Boston, Mass.
Western Pygmy-Blue (Brephidium exile)
distribution map
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