Swarthy Skipper (Nastra lherminier [Latreille])
Wing span: 1 - 1 1/8 inches (2.5 - 2.9 cm).
Identification: Upperside is dark brown; forewing may have 2 very faint light spots. Underside of hindwing is yellow-brown with lighter veins.
Life history: Males perch near the ground on grass stems; most mating occurs in the late afternoon.
Flight: Two broods from May-September, earlier in the south.
Caterpillar hosts: Little bluestem (Andropogon scoparius).
Adult food: Nectar from low-growing flowers including selfheal, red clover, tick trefoil, purple vetch, New Jersey tea, and peppermint.
Habitat: Grassy, open areas such as sand barrens, meadows, hillsides, fields.
Range: Eastern United States from Missouri east to southern New York; south to eastern Texas, the Gulf states, and southern Florida. Strays north to northern Minnesota, southern Michigan, and western 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. Stanford, R. E. and P. A. Opler. 1993. Atlas of western USA butterflies including adjacent parts of Canada and Mexico. Denver and Fort Collins, CO.
Author: Jane M. Struttmann
State and Regional References:
Cech, R. 1993. A Distributional Checklist of the Butterflies and Skippers of the New York City Area (50-mile Radius) and Long Island. New York City Butterfly Club Special Publication. 27 pp. Forbes, W.T.M. 1960. Lepidoptera of New York and Neighboring States. Part IV: Agaristidae through Nymphalidae Including Butterflies. Cornell Univ. Agricultural Experimental Station, Ithaca, N.Y. Memoir 371. 188 pp. Glassberg, J. 1993. Butterflies Through Binoculars: A Field Guide to Butterflies in the Boston-New York-Washington Region. Oxford Univ. Press, New York, N.Y. 160 pp. Klass, C. and Dirig, R. 1992. Learning about Butterflies. Cornell Cooperative Extension Publication, 4-H Member/Leader Guide 139-M-9. Ithaca, N.Y. 36 pp. Layberry, R.A., Hall, P.W. & Lafontaine, D.J., 1998. The Butterflies of Canada. University of Toronto Press, Toronto, ON. 280 pp. Opler, P.A. 1998. A field guide to eastern butterflies, revised format. Houghton Mifflin Co., Boston. Shapiro, A.M. 1974. Butterflies and Skippers of New York State. Cornell Univ. Agricultural Experimental Station, Ithaca, N.Y. Search 4:1-60.