December Moth Poecilocampa populi
Wingspan 30-45 mm.
The flight time for this moth is, as the name suggests, late in the year. In fact it can be found from October until mid or late December.
It is a fairly common species over much of Britain.
The female is distinctly larger than the male, and the wings have a slightly translucent appearance, due to their thinly-scaled surface.
The larvae feed in spring on a variety of deciduous trees.