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 feed gregariously from a silken web.
Recorded in 62 (23%) of the 270 2km squares of Huntingdonshire.
Last recorded in July 2018
Recorded date range (Adult): 08 June to 03 September
Recorded date range (Pupa): 14 June to 14 June