North American Butterflies and Moths List

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U.S. Geological Survey

Butterflies of North America

Blue-studded Skipper (Sostrata nordica)
JPG -- species photo

Blue-studded Skipper (Sostrata nordica [Evans])

Wing span: 15/16 - 1 3/16 inches (2.4 - 3 cm).

Identification: Upperside is dark brown with a complex, variegated pattern and a scattering of iridescent blue scales. Forewing has 4 small spots near the apex.

Life history: Not reported.

Flight: October in South Texas; April-October in Mexico and Central America.

Caterpillar hosts: Not reported.

Adult food: Probably flower nectar.

Habitat: Open subtropical scrub.

Range: Argentina north through tropical America to Mexico. A rare stray to the lower Rio Grande Valley, Texas.

Conservation: Not necessary for a rare stray.

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.


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.

Author: Jane M. Struttmann

Blue-studded Skipper (Sostrata nordica)
distribution map
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