Last modified: April 28, 2020, 5:40 p.m.
An extreme rare migrant from southern Europe. So far known only 3 records for Belgium: one in 1906 (NA), 2018 (WV) en 2019 (HA).
The yellowish white larva feeds in spun shoots and flower heads of Verbascum, living gregariously together.
Adults are on the wing from April till mid October in two generations a year.