Host plants:
Probably the caterpillar lives on wilted or dead plants at ground level.
Habitat:
Idaea filicata inhabits xerothermic habitats from sea level up to 1000m above sea level, rarely higher.
Life cycle:
Idaea filicata flies in several generations from May to early October.
Remarks:
Idaea filicata occurs in Southern Europe and Western Asia. To the north, it reaches to eastern Austria and around Lake Garda.