Host plants:
The caterpillars live polyphagous on grasses and herbs.
Habitat:
Agrotis simplonia inhabits extensively managed hillsides with some gappy stocks or stony-rocky areas from the valleys up to about 2000m asl.
Life cycle:
Probably the caterpillar overwinters similar to Agrotis cinerea fully-grown and pupates shortly after snowmelt. Presumably, the animals need at higher altitudes two winters. The moths fly from mid-May to early August (at high altitudes).
Remarks:
Agrotis simplonia is found only in the Alps and the Pyrenees, and is within these areas usually quite common.