North American Butterflies and Moths List

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Butterflies of North America

Butterflies of Mississippi

Dusky-blue Groundstreak (Calycopis isobeon)
JPG -- species photo

Dusky-blue Groundstreak (Calycopis isobeon [Butler & Druce])

Wing span: 7/8 - 1 1/4 inches (2.2 - 3.2 cm).

Identification: Two tails on the hindwing. Underside of both wings gray-brown; inner edge of postmedian line bordered narrowly with red-orange. Underside of hindwing has eyespot at lower apex with equal amounts of orange and black.

Life history: Eggs are laid in leaf litter on the ground. Caterpillars eat dead leaves and fruits, and detritus.

Flight: Many flights from January-September in Texas and Mexico.

Caterpillar hosts: Dead leaves and fruits, and detritus, especially under trees in the cashew family (Anacardiaceae).

Adult food: Flower nectar.

Habitat: Subtropical valley bottoms and lowland forest edges.

Range: Venezuela north through Central America and Mexico to central and South Texas. Strays into Mississippi and Kansas.

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.


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.

Author: Jane M. Struttmann

State and Regional References:

Layberry, R.A., Hall, P.W. & Lafontaine, D.J., 1998.  The Butterflies of 
     Canada.  University of Toronto Press, Toronto, ON.  280 pp. 

Mather, B. and Mather, K.  1958.  The Butterflies of Mississippi.  Tulane 
     Studies in Zoology 6:63-109.
Opler, P.A. 1998. A field guide to eastern butterflies, revised format.
     Houghton Mifflin Co., Boston.      
Dusky-blue Groundstreak (Calycopis isobeon)
distribution map
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