Wingspan 38 to 44 mm. A variable species, with forewings ranging from pale buff to reddish-brown. The blackish twin spots are usually obvious, but in some forms, including ab. immaculata, these are reduced to barely discernible rufous marks, or obsolete.

In woodland and other well wooded habitats.

Flying in March and April, like several related species, it can be found feeding on Willow blossom at night.

The caterpillars feed in early summer on various trees, including Oak, Aspen and Willow.

It is widely distributed in England and Wales, but local in Ireland and Scotland. In a recent survey to determine the status of all macro moths in Britain this species was classified as common.

Fairly common in Leicestershire and Rutland. L&R Moth Group status = A (common and resident).