Erebia calcaria
Erebia calcaria, or Lorkovic's brassy ringlet, is a butterfly of the family Nymphalidae. It is found in the Alps. The species inhabits southern exposed slopes with alpine grassland interspersed with rocks. Screes without vegetation or only a few grass tussocks cannot serve as habitat. Taxonomy
E. calcaria is a member of the brassy ringlet  species complex. Biology
The species is only active when the sun is shining. They fly close to the ground, visiting flowers from time to time and spend much of their time on rocks, resting. The female deposits her eggs on dry grass stalks, just above the ground. The caterpillars feed on Nardus stricta and on various Festuca and Sesleria species. References

Butterflies described in 1949
Erebia
Butterflies of Europe
Habitats Directive Species