Magdalena Alpine (Erebia magdalena Strecker)
Wing span: 1 3/4 - 2 inches (4.5 - 5.1 cm).
Identification: Wings are black above and below. Subspecies erinnyn has an orange tinge on the forewings.
Life history: To find females, males patrol over rockslides all day. Eggs are laid near rockslides, on grasses and sedges, and on the side of rocks near rushes. Caterpillars hibernate.
Flight: One brood from late June-July.
Caterpillar hosts: Probably grasses, sedges, and/or rushes.
Adult food: Flower nectar.
Habitat: Rockslides near vegetation, at or above treeline.
Range: Alaska's Brooks Range; high mountains of Colorado, western Wyoming, and northeast Utah.
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.
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:
Ferris, C.D. and F.M. Brown. 1980. Butterflies of the Rocky Mountain States. University of Oklahoma Press. Norman. 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. Add Toliver, M., Holland, R., and S.J. Cary. 1996. Distributional data for New Mexico Butterflies. Privately published. Albuquerque, N.M.