The pearl-bordered fritillary (Boloria euphrosyne) is a butterfly of the family Nymphalidae found in Europe and through Russia across the Palearctic to the north of Kazakhstan.

Very similar to the preceding species , especially selene, but brighter red and the black markings thinner in typical specimens.

Easily recognized by the hindwing beneath, which is bright brick-red at the base, not brown as in selene, the median band bearing only one silver-spot (across the apex of the cell) and the incomplete silvery band in the distal area being replaced by some yellow smears without any silvery gloss.

[1] The pearl-bordered fritillary is widespread throughout Europe, ranging from Scandinavia to northern Spain and from Ireland eastwards across the Palearctic to Russia and to the north of Kazakhstan.

After a period of feeding and growth, during which it moults one last time, the caterpillar is full size and ready to pupate.