One of several very similar moths which can be difficult to separate. It is usually necessary to carry out genital dissection for a positive identification.

In general this species is a little larger than S.ambigualis, with heavier markings, a more grey colour and a strongly chequered fringe.

Deciduous woodland.

Recorded in 61 (22.6%) of the 270 2km squares of Huntingdonshire.

Last recorded in July 2019

Recorded date range (Adult): 16 May to 18 September