Local in open woodland, mainly south of a line from Lincolnshire to Herefordshire and Worcestershire, scarce elsewhere into Wales and Ireland (MBGBI Vol 2). Once rather scarce in Hampshire and on the Isle of Wight, this species has now been found widely throughout. Wingspan 8-10 mm. The second generation, when it occurs, overwinters to emerge in spring. Imago seldom encountered at light, and more likely to be recorded in the larval stage, when mines are relatively easy to find where they are present. Larva mines leaves of oak Quercus, including Evergreen Oak.