Boloria aquilonaris (Stichel, 1908)


Boloria aquilonaris: Female (S-Germany, Allgäu, near Kleinwalsertal, 1100m asl, early July 2015) [N] Boloria aquilonaris: Adult (S-Germany, Allgäu, near Kleinwalsertal, 1100m asl, early July 2015) [N] Boloria aquilonaris: Female (S-Germany, Allgäu, near Kleinwalsertal, 1100m asl, early July 2015) [N] Boloria aquilonaris: Female (S-Germany, Allgäu, near Kleinwalsertal, 1100m asl, early July 2015) [N] Boloria aquilonaris: Adult (S-Germany, Allgäu, near Kleinwalsertal, 1100m asl, early July 2015) [N] Boloria aquilonaris: Female [S] Boloria aquilonaris: Lower side [S] Boloria aquilonaris: Ovum (Photo: Mario Peluso) [S] Boloria aquilonaris: Egg (S-Germany, Allgäu, near Kleinwalsertal, 1100m asl, early July 2015) [M] Boloria aquilonaris: Egg (S-Germany, Allgäu, near Kleinwalsertal, 1100m asl, early July 2015) [M] Boloria aquilonaris: Egg (S-Germany, Allgäu, near Kleinwalsertal, 1100m asl, early July 2015) [S] Boloria aquilonaris: Larva in the habitat (Photo: Mario Peluso) [N] Boloria aquilonaris: Habitat in the Bavarian pre-Alps area: larval habitat in the background [N] Boloria aquilonaris: Habitat with much Vaccinium oxycoccus (S-Germany, Allgäu, near Kleinwalsertal, 1100m asl, early July 2015) [N] Boloria aquilonaris: Habitat with much Vaccinium oxycoccus (S-Germany, Allgäu, near Kleinwalsertal, 1100m asl, early July 2015) [N]

Host plants:
The larvae feed on Ericaceae, particularly Oxycoccus palustris, but also on Andromeda.

Habitat:
Boloria aquilonaris inhabits bogs and moors with the occurrence of larval host plants. The butterflies are found in neighboring fen meadows in the search for nectar plants.

Life cycle:
Boloria aquilonaris flies between mid-June and July. The caterpillar overwinters in the first instar and lives at open places where the host plant grows on turf mosses.

Endangerment: strongly endangered

Endangerment factors:
Boloria aquilonaris is strongly endangered by bog destruction (drainage, eutrophication, afforestation, grazing, encroachment after disturbance of the water balance, peat industry, etc.). The flower-rich fen meadows in the vicinity of the larval habitats are an indispensable part of the overall habitat, too.

Remarks:
Boloria aquilonaris is distributed from Central and Northern Europe to east Asia. In Central Europe it is highly local on bogs.



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