Last modified: Sept. 15, 2023, 7:33 p.m.
This very rare and local species has not been seen in LG for quite some time. An endangered species in Europe.
Native
In the autumn, the larvae are easy to find particularly in October at the old fronds near the ground. They can be tapped in September/October. The caterpillars are fully-grown in May.
The adults fly from mid-June through August, with a peak around mid-July.
In summer and autumn, the young caterpillars live only on ferns (especially Dryopteris filix-mas and related species) and only rarely on Pteridium aquilinum.
In spring the caterpillars are polyphagous because the caterpillars have not yet found any newly sprouted fern fronds after hibernating, they now feed on numerous flowering plants from very different families.
Mountain forest with ferns.