This small but stunning insect would appear to be Darwin's Heath (Coenonympha darwiniana), based on all the literature I can find. Alternative views welcome.
In comparison to our Small Heath, this is a very vividly coloured insect but equally shy!
I am beginning to think that the Col des Fillys (where this image was taken) in the Alpes de Haute Provence is perhaps one of the best butterfly spots I have found for diversity.
Close-up and macro
Wildlife and nature
Col des Fillys
NaturesHaven, Glostopcat, georgiepoolie and 25 more