Scotch Argus (Erebia aethiops)

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The Scotch Argus lives in well-defined colonies in rough damp or boggy grassland in mountainous or hilly areas in Scotland up to 500m where its main foodplant is Purple Moor Grass (Molinea caerulea). At its only two (dryer) sites in northern England, Blue Moor Grass (Sesleria caerulea) is the main foodplant. The butterfly is often abundant where it occurs