Host plants:
The larvae feed in the flowers of early woody Rosaceae, especially Malus, Prunus, Amelanchier and Pyrus.
Habitat:
Calliclystis rectangulata inhabits occurrences of the host plants from scrub to single apple trees in gardens.
Life cycle:
The egg hibernates. Larvae are found in April and May. Moths are on the wing between mid-May and late July.
Remarks:
Calliclystis rectangulata is widespread in Europe and temperate Asia to Japan.