Since this coloring is less evident in older butterflies (and deviations occur), the characteristic arrangement of the spots on the underside of the hind wing should always be used to determine.

On the upper side of the forewing, there is a series of small, distinctly bright spots in the submarginal bandage, which runs in a regular flat curve to the front edge.

[2] Due to the location requirements of Sanguisorba minor, there is a close connection between Spialia sertorius and poor grasslands on limestone or calcareous conglomerates.

Above 1000 m, the thermal requirements of the species are only met at locations that are particularly favorable in terms of microclimate, such as south-facing slopes.

The altitudinal limit of the host plant in the Bavarian Alps is usually only a little over 1200 m. However, from the warm years after the Second World War, there are documents with altitudes around 1700m and 1700-2000 m. The butterflies had likely drifted.

From around the middle of August, there are signs of a renewed accumulation of reports that can be traced back to the appearance of the second generation.

Since Sanguisorba minor only blooms again regularly after the summer drought in arid grassland, the second-generation females in many places only have leaves available as an egg-laying medium.

According to field observations in Switzerland, the caterpillars spend the winter in a partial leaf of the Sanguisorba minor spun together as housing.

The males are easiest to spot because they behave territorially and regularly visit places like Sanguisorba minor flowers.

Even rock areas on dry slopes are no longer used as a reproductive habitat due to shade provided by neighboring trees.

[2] Mowing is unsuitable for maintaining the necessary habitat structures in most locations, as it encourages the development of closed, grass-dominated vegetation.

Due to their less extreme site conditions, numerous habitats, such as urban wastelands or railway embankments, can hardly be preserved in the long term through biotope maintenance alone.