Host plants:
The larvae feed on Ulmus, Prunus and some other woody species. I found caterpillars on blackthorn.
Habitat:
Cosmia pyralina inhabits riparian forests and other deciduous or mixed forests and wood-rich areas.
Life cycle:
The egg overwinter. Caterpillars are found mainly from April to May, only rarely still in early June. The moths fly mainly from mid-June to early August.
Remarks:
Cosmia pyralina is widespread in temperate Eurasia to Japan.