Host plants:
The caterpillar lives according to literature on Stellaria species (perhaps especially Stellaria holostea).
Habitat:
Euphyia biangulata colonized open woods such as oak and hornbeam forests, ash forests, as well as coniferous forests.
Life cycle:
Euphyia biangulata flies, depending on altitude, usually in two generations from May to late August. In slightly higher or cooler areas often only a single generation in June/July is formed. The pupa overwinters.
Endangerment: regionally endangered or decreasing
Remarks:
Euphyia biangulata occurs in Europe north to southern Sweden and southern Finland. It also occurs in Anatolia and the Caucasus region.