As with most Pyrgus species it has dark brown wings with pale chequered margins and is rather difficult to identify specifically in the field but good views reveal clear, well-spaced white spotting on the forewing and much fainter markings on the hindwings.

Therefore, in many cases, the reports can neither be clearly assigned nor is a taxonomic separation based on biological differences within the complex confirmed.

Sand grasslands are also occupied locally, for example in the foothills of the Middle Franconian Jura and the Danube-Isar hill country.

All of these are poor locations that, with the exception of occurrences in the Alps, are usually grazed regularly and have a correspondingly short-grass structure.

This applies to both the alpine and extra-alpine regions of Bavaria and corresponds to an only slightly shorter period of time, as is also known from the Swabian Alb in Baden-Württemberg.

Despite the long period in which imagos can be observed, according to the current state of knowledge, Pyrgus alveus agg.

[2] The altitude distribution extends from the colline level at almost 300 m in the Grabfeldgau and the Haßberge in northwest Bavaria to the alpine zone at 2100 m in the Allgäu high Alps.

The occurrences in the Alps spread over a wide area of almost 700-2100 m, a less pronounced focus concerns the altitude between 1000 m and 1400 m.[2] Oviposition of Pyrgus alveus agg.

From the Swabian Alb (Baden-Württemberg) and Switzerland, only Helianthemum nummularium is mentioned as an egg-laying and larval food plant.

The caterpillars live in a web or in the typical Pyrgus leaf bags, which are newly created after a molt.

The prerequisites for a population are habitats with frequent occurrence of host plants, which are grazed regularly, mostly by sheep.

The central element for the preservation and promotion of the species complex is therefore the maintenance or reintroduction of herding sheep farming as well as extensive cattle grazing on lean sites.

Lean grasslands that are regularly grazed several times a year and are therefore short-grassed are characterized by favorable habitat structures and correspondingly rich populations.

species complex can be reliably differentiated by molecular biological characteristics, investigations of butterfly samples via "DNA barcoding" were started.

The results show a complex pattern of diverse, extremely closely related genetic lines.