This is an extremely variable butterfly in size,
wing patterns and colouration. It flies on the high mountains of central
Europe, including the Pyrenees and the Alps. The most constant feature
is the underside hindwing that has streaked orange, yellow or white
markings particularly in space 4. In the Pyrenees though the local
subspecies constans flies which has hardly any markings at
all.
It is a common butterfly of alpine meadows which is why I'm so
surprised I have so few photos of it.