Boloria aquilonaris (Stichel, 1908)


Boloria aquilonaris: Male (S-Germany, Kempter Wald, July 2021) [N] Boloria aquilonaris: Male (S-Germany, Kempter Wald, July 2021) [N] Boloria aquilonaris: Female (S-Germany, Kempter Wald, July 2021) [N] Boloria aquilonaris: Female (S-Germany, Kempter Wald, July 2021) [N] Boloria aquilonaris: Female (S-Germany, Kempter Wald, July 2021) [N] Boloria aquilonaris: Female (S-Germany, Kempter Wald, July 2021) [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-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-Germany, Kempter Wald, July 2020) [N] Boloria aquilonaris: Female (S-Germany, Kempter Wald, July 2020) [N] 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: Egg (S-Germany, Kempter Wald, July 2020) [S] Boloria aquilonaris: Egg (S-Germany, Kempter Wald, July 2021) [S] Boloria aquilonaris: Young larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Young larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Young larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Half-grown larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) Boloria aquilonaris: Half-grown larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Half-grown larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Half-grown larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Half-grown larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Half-grown larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Half-grown larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Half-grown larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Larva in the penultimate instar (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Larva in the penultimate instar (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Larva in the penultimate instar (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Larva (e.o., N-Alps, Kleinwalsertal, 1100m, 2017) [S] Boloria aquilonaris: Larva in the habitat (Photo: Mario Peluso) [N] Boloria aquilonaris: Larval habitat with Vaccinium oxycoccus (S-Germany, Kempter Wald, June 2020) [N] Boloria aquilonaris: Habitat with Vaccinium oxycoccus (S-Germany, Kempter Wald, July 2021) [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 factors:
Boloria aquilonaris is strongly endangered by bog destruction (drainage, eutrophication, afforestation, grazing, bush 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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