Acadian Hairstreak (Satyrium acadica [W. H. Edwards])
Wing span: 1 1/8 - 1 1/2 inches (2.9 - 3.8 cm).
Identification: One tail on each hindwing. Upperside brown-gray. Underside of hindwing gray; blue marginal spot is capped with orange; row of orange submarginal spots capped with black; round black spots form postmedian row.
Life history: Males perch on low vegetation near host plants to watch for females. Eggs are laid on twigs and hatch the next spring; caterpillars eat leaves.
Flight: One flight from June-August.
Caterpillar hosts: Various willow species including black willow (Salix nigra) and silk willow (Salix sericea).
Adult food: Nectar from flowers including butterflyweed, meadowsweet, milkweeds, New Jersey tea, and thistles.
Habitat: Willow-lined streams, marshes, moist woodlands.
Range: British Columbia east to Nova Scotia; south to Idaho, Colorado, the upper Midwest, Maryland, and New Jersey.
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. 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:
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. 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. Woodbury, E.N. 1994. Butterflies of Delmarva. Delaware Nature Society, Inc., Tidewater Publishers, Centreville, MD. 138 pp. [NOTE: this book only treats True Butterflies (Papilionoidea). It does not treat Skippers (Hesperioidea).]