Bartram's Scrub-Hairstreak (Strymon acis [Drury])
Wing span: 7/8 - 1 1/8 inches (2.2 - 2.9 cm).
Identification: Hindwing with 1 long and 1 short tail. Upperside dark gray. Underside light gray. Hindwing with wide straight postmedian band of white edged with black; 2 white spots near base of wing.
Life history: Eggs are laid singly on flower stalks of host plant. Young caterpillars eat upperside of leaves, flowers, and fruits; older caterpillars feed on leaves.
Flight: Three to four flights in Florida from February-November.
Caterpillar hosts: Narrow-leafed croton (Croton linearis) in the Euphorbiaceae family.
Adult food: Nectar from flowers of narrow-leafed croton and shepherd's needle.
Habitat: Pine forest openings.
Range: Southern Florida and the Keys, West Indies.
Conservation: All populations should be conserved.
The Nature Conservancy Global Rank: G4 - Apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery.
Management needs: Prevent further loss of habitat. Ensure that host plant colonies remain in suitable condition.
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:
Gerberg, E.J. and Arnett, R.H., Jr. Florida Butterflies. Natural Science Publications, Inc. Baltimore, MD. 90 pp. Kimball, C.P. 1965. Arthropods of Florida and Neighboring Land Areas - Vol. 1: Lepidoptera of Florida. Div. of Plant Industry, State of Florida Dept. of Agriculture. Gainesville, FL. 363 pp. Minno, M.C. and Emmel, T.C. 1993. Butterflies of the Florida Keys. Scientific Publishers. Gainesville, FL. 168 pp. Opler, P.A. 1998. A field guide to eastern butterflies, revised format. Houghton Mifflin Co., Boston. Smith, D.S., Miller, L.D. and Miller, J.Y. 1994. The Butterflies of the West Indies and South Florida. Oxford Univ. Press. Oxford, U.K. 264 pp.