Erebia mnestra (Hübner, 1804)


Erebia mnestra: Upper side (Ticino) [S] Erebia mnestra: Lower side (Ticino) [S] Erebia mnestra: Ovum (Valais, Switzerland) [S] Erebia mnestra: Ovum after some days [S] Erebia mnestra: Ovum after some days [S] Erebia mnestra: L1 [S] Erebia mnestra: Half-grown larva [S] Erebia mnestra: Half-grown larva [S] Erebia mnestra: Larva in penultimate instar [S] Erebia mnestra: Larva in penultimate instar [S] Erebia mnestra: Larva, early last instar and still brown (together with fully-grown larvae of Erebia flavofasciata, Ticino) [M] Erebia mnestra: Larva, getting greenish during the last instar, head still brownish! [S] Erebia mnestra: Fully-grown larva, dorsal (e.l. Ticino) [S] Erebia mnestra: Fully-grown larva lateral Erebia mnestra: Pupa [S] Erebia mnestra: Pupa ventral [S] Erebia mnestra: Pupa dorsal [S] Erebia mnestra: Habitat: Festuca at a dry, steep slope in the northern Ticino in 2300m above sea level in May [N]

Host plants:
Grasses, especially Festuca species (Festuca ovina agg.)

Habitat:
Erebia mnestra inhabits dry slopes with Festuca stocks from 1500 to 2500m above sea level.

Life cycle:
Apparently the caterpillar overwinters twice (once in the first or second and once in penultimate instar, Sonderegger 2005). I found larvae in penultimate, still brown instar on a south facing slope in northern Ticino in 2300m above sea level in the first half of May 2007. The adults fly from late June into August.

Endangerment factors:
Erebia mnestra is only locally threatened by the usual factor habitat destruction for agricultural or tourism profit maximization, more rarely also reforestation and abandonment in lower sites.

Remarks:
Erebia mnestra occurs in the Alps, especially in the central and southern part. It is missing in the north, e.g. in the German Alps.



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