Adonis blue (I think)

Today we saw some more picture-perfect towns and villages in Alsace, but we also did a bit of wildlife viewing in the afternoon. From Rhinau on the west bank of the Rhine there is a free ferry that takes you across to the German side, where there is an extensive nature reserve. On one of the raised banks we found loads of common blues, small whites and quite a few adonis blues too - that's what I'd call it in the UK but there are so  many possibilities in Europe! Later we found we were on the appropriately-named Sentiers des Papillons.