Ridings' Satyr (Neominois ridingsii [W. H. Edwards])
Wing span: 1 1/2 - 2 3/16 inches (3.8 - 5.6 cm).
Identification: Upperside is gray with cream-colored patches across both wings; forewing has 2 black spots. Underside is similar but lighter.
Life history: Males perch in the morning on small hills or mesas to seek females. Eggs are laid singly at the top of blue grama grass or on other plants. Caterpillars eat grass blades and pupate underground. Third- and fourth-stage caterpillars hibernate. Biennial in Tuolumne County, California.
Flight: One brood from June-July.
Caterpillar hosts: Blue grama grass (Bouteloua gracilis).
Adult food: When adults feed, which is infrequently, they favor nectar of yellow composites.
Habitat: Short-grass prairie, intermountain areas, and grasslands with some areas of bare soil.
Range: Southern Alberta east to southwest Manitoba, south to central Arizona and central New Mexico, west to eastern California.
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 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.