Erebia gorge
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Switzerland, July 2009
Switzerland, July 2009
Switzerland, July 2009
Distribution
The silky ringlet is a high
altitude
species, rarely found below about 1800m and flying up to 3000m. As you
climb a mountain, leaving lush semi-alpine meadows and bushes behind,
this butterfly is often the indicator you have made it to the rarefied
regions! Suddenly, they start appearing on the track ahead of you or
disappearing over the rocks. Indeed, silky ringlets love rocks, for
sitting on with wings closed or for basking. They are locally common in
Switzerland and generally widespread in mountains in the southern half
of Europe.
The upperside, as the name suggests, does often have a silky texture, but this is not always apparent and not a good identifying feature. This is a variable butterfly but all forms have broad, red bands - never spots - on the forewings. There may or may not be similar bands on the hindwings. There are typically two white-pupilled apical spots on each forewing, angled outward towards the costa. There may or may not be spots on the hindwing. The underside hindwing is roughly marbled, with a dark band across the middle of the wing - resembling a very dark version of a brassy ringlet. The hindwing is slightly pointed at v.5, but this is not always noticeable.
The larval foodplants are
various alpine
meadow grasses, fescues and hair grasses. The caterpillars hibernate
twice, taking two seasonal cycles to complete their development, and
the adults fly in a single brood from late June to August.