Hadena filograna (Esper, 1788)

Host plants:
The larvae feed on Silene nutans (flowers, fruits, in later insars also leaves). I could not record other species yet. But probably the species uses Silene species which are closely related with Silene nutans in Southern Europe.

Habitat:
Hadena filograna inhabits warm and dry locations of Silene nutans on rocky slopes or in old quarries. In the medium-high mountains (Swabian Alb), this species is usually syntopically found with Hadena albimacula. THadena filograna seems to be absent from the northern Alps. But it occurs in lower and medium high altitudes of the inner alpine dry valleys (Valais, personal observation) and in the south, but exceeds unlike Hadena albimacula, H. caesia and H. confusa not the 2000m mark.

Life cycle:
Hadena filograna flies in a single generation from mid-May to early July. The caterpillar is observed in the Swabian Alb especially in June (eggs from mid/late May), and still until mid-July.

Endangerment: strongly endangered

Endangerment factors:
Hadena filograna is endangered by habitat loss (succession, reforestation, climbing, other destruction) and overgrazing.

Remarks:
The total distribution extends from Morocco across more southerly parts of Europe to Central Asia. In Central and Southern Europe, Hadena filograna is widespread, but always very locally and in decline in the north.