Wingspan about 14mm. Although quite variable in intensity of markings and depth of ground colour, this species generally shows a distinctive black bar at the base of the forewing leading edge, a good identification pointer.

In areas where the larval food plants are common.

The moths emerge in July, and unlike most other members of the group, overwinter, sometimes being found again in the following spring.

The larva feeds inside a folded leaf of oak or dogwood.

Widespread in mainland Britain, but quite uncommon. In the Butterfly Conservation's Microlepidoptera Report 2011 this species was classified as Nationally Scarce B.

It appears to be uncommon in Leicestershire and Rutland, where there are few records. L&R Moth Group status = D (rare or rarely recorded).