Desert Green Hairstreak (Callophrys comstocki Henne)
Wing span: 13/16 - 1 inches (2.2 - 2.9 cm).
Identification: Upperside gray. Underside gray-green with sinuous row of white dots on hindwing.
Life history: Males perch to watch for females in depressions or gulch bottoms. Females lay eggs singly on host plant leaves. Caterpillars eat leaves, although some prefer flowers and young fruits. Chrysalids hibernate.
Flight: One or two flights from March-May and August-September, second flight usually small.
Caterpillar hosts: Various wild buckwheats (Eriogonum), especially Wright's buckwheat and racemose buckwheat
Adult food: Flower nectar.
Habitat: Sagebrush scrub, pinyon-juniper woodland.
Range: Great Basin and arid inter-mountain West from northern Nevada and eastern California east to southern Utah and western Colorado.
Conservation: Habitats are being invaded by Cheatgrass in some areas. Subspecies interrupta Austin in Nevada may be in greater need of conservation.
The Nature Conservancy Global Rank: G2,G3 - for species. Imperiled because of rarity (6 to 20 occurrences), or because of other factors demonstrably making it very vulnerable to extinction throughout its range. (Endangered throughout its range). OR very rare or local throughout its range or found locally in a restricted range . T1,T2 for subspecies interrupta.
Management needs: None reported but assessment of various populations, especially on public lands, is necessary.
Emmel, T.C. and J.F. Emmel. 1973. The butterflies of southern California. Natural History Museum of Los Angeles County, Los Angeles. 148 pages. Ferris, C.D. and F.M. Brown. 1981. Butterflies of the Rocky Mountain States. University of Oklahoma Press, Norman. 442 pages. Garth, J.S. and J.W. Tilden. 1986.California Butterflies. University of California Press, Berkeley and Los Angeles. 246 pp, 24 plates. Opler, P.A. 1999. A field guide to western butterflies. Houghton-Mifflin Co., Boston, Mass. 540 pages, 44 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: Paul A. Opler
State and Regional References:
Brown, F.M., Eff, J.D., and B. Rotger. 1957. Colorado Butterflies. Denver Museum of Natural History, Denver. Ferris, C.D. and F.M. Brown. 1980. Butterflies of the Rocky Mountain States. University of Oklahoma Press. Norman. Layberry, R.A., Hall, P.W. & Lafontaine, D.J., 1998. The Butterflies of Canada. University of Toronto Press, Toronto, ON. 280 pp. Opler, Paul A. 1999. Peterson Field Guide to Western Butterflies, revised edition. Houghton Mifflin Co., Boston, Mass. Stanford, R.E. and P.A. Opler. 1993. Atlas of Western USA Butterflies. Privately published, Denver, Colo. Tilden, J.W. and A.C. Smith. 1986. A Field Guide to Western Butterflies. Houghton Mifflin Co., Boston, Mass.