Val d'Aran, July 2005

Val d'Aran, July 2005

Val d'Aran, July 2005

Val d'Aran, July 1999

This is form eris, in which the silver spots on the underside hindwing are replaced by buff, but outlined in black. This fritillary is similar to the High Brown Fritillary, but can always be distinguished, whether this form or the 'nominate form' (see pictures HERE) by the black veins on the underside hindwing, the slightly convex, not concave border to the forewing and the buff spot with a black centre in the cell of the hindwing. When present, this confirms niobe.