This is a mountain butterfly in Bulgaria. We have recorded it from about 1200 to 2200masl. They are most often seen basking in the sun on rocks, stony banks or fallen trees, on open rocky areas or in glades amongst Spruce (Picea abies), or pine (Pinus sp(p.)) forest. They should be approached carefully to photograph them as they are easily disturbed.

It occurs at highter altitudes than it's cogener, the Large Wall Brown (Lasiommata maera), but their altitudinal ranges overlap. It is smaller and darker than the Large Wall Brown. However it can most easily be distinguished by the presence of a curved and wavy transverse line across the centre (basal of the marginal row of eye spots) of the upperside of the hindwing, which is absent in the larger species. 

Because of their dark colour and their eye-spots, they are sometimes mistaken for ringlets (Erebia spp.), but like other wall browns and grayling species, thy have a characteritic flght with wings held in a 'V' shape in flight in moments when they glide.