Poplar Grey Subacronicta megacephala
([Denis & Schiffermüller], 1775)
Wingspan 40-44 mm.
One of several powdery-looking greyish moths which can be difficult to identify, this species has however a distinctly round whitish orbicular stigma with a darker centre, and whitish hindwings.
It is commonest in the south of England, with the range extending into southern Scotland, and flies from May to August.
The grey-brown caterpillar feeds on the leaves of poplar (Populus), resting by day in a peculiar question-mark position with the head curled back.