Wingspan 8-11 mm.
Fairly common in deciduous woodland throughout much of Britain, the adult moth is golden brown and has darker tips to the forewings.
It flies in May and June, and the larval stages occur from September and October.
The larva generally feeds on the leaves of oak (Quercus) or sweet chestnut (Castanea sativa), forming distinctive white mines on the upperside.
The larvae overwinter inside a circular chamber in the mine, and then pupate inside this chamber in late spring.