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Butterflies of North Dakota -- Erebia discoidalis

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Butterflies of North America

Butterflies of North Dakota

Red-disked Alpine (Erebia discoidalis)
JPG -- species photo

Red-disked Alpine (Erebia discoidalis [Kirby])

Wing span: 1 1/2 - 1 15/16 inches (3.8 - 4.9 cm).

Identification: Wings are brownish black and lack eyespots. Forewing has a large chestnut red patch both above and below. Underside of hindwing is mottled gray and brown.

Life history: Adults fly slowly near the ground. Males patrol for females with a weak flight. Fourth-stage caterpillars hibernate; probably biennial.

Flight: One brood from early May to mid-June.

Caterpillar hosts: Bluegrasses (Poa species).

Adult food: Flower nectar.

Habitat: Large, open, grassy bogs; other areas with acidic soils.

Range: Holarctic. North America from Alaska south and east to southern Alberta, northern Montana, northern Wisconsin, northern Michigan, and southern Quebec.

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.

References:

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:

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.

Royer, R.A. 1988. Butterflies of North Dakota. Science Monograph #1, Minot 
     State University, Minot, North Dakota.

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.
Red-disked Alpine (Erebia discoidalis)
distribution map
map legend

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