The Scotch Argus is widespread and common throughout much of Scotland, especially in the Highlands and on the West Coast. In Scotland, it uses a variety of different habitats such as damp grassland, bogs and woodland edges where the larvae feed on Purple Moor Grass. The only English colonies are found at two sites in Cumbria where the habitat is scrubby LIMESTONE GRASSLAND dominated by Blue Moor grass. It is interesting to note that the Cumbrian colonies use Blue Moor grass despite Purple Moor Grass, the foodplant of Scottish colonies being abundant within the county. On a good day very large numbers can be seen.
Where to look
The only two sites that hold this butterfly are Smardale Gill Nature Reserve near Kirkby Stephen SD 729072 and Arnside Knott SD 455775
When to look
The Scotch Argus has a very late emergence, it can be seen from the last week of July throughout August.