This species is very difficult to distinguish from other members of the Yponomeuta, even by genitalia examination. Identification is best achieved with reference to the food plant.
The larvae initially mine leaves but then feed gregariously from a silken web.
Recorded in 56 (20.7%) of the 270 2km squares of Huntingdonshire.
Last recorded in September 2018
Recorded date range (Adult): 04 June to 15 September