Common Quaker Orthosia cerasi
Wingspan 34-40 mm.
Quite variable, there are forms with a plain ground colour, and others with a darker band across the forewing, but all have large, rounded stigmata outlined paler.
The single generation flies in March and April, when it is often attracted to light.
Widespread and common throughout Britain, except for the far north, where it is somewhat scarcer.
The foodplants of the larvae are oak (Quercus), sallow (Salix) and other deciduous trees.