Wingspan 14 to 15 mm.

Around Sycamore.

The adult moths are on the wing in July and August, from late afternoon onwards, and are most often encountered at light.

The larvae feed inside the seeds of sycamore (Acer pseudoplatanus), and their presence is sometimes betrayed by small exit holes in the seeds themselves.

An adventive colonist, first discovered in Britain in 1943 in south-east Kent. Since then it has become widely but thinly established over much of England and Wales. In the Butterfly Conservation's Microlepidoptera Report 2011 this species was classified as local.

Occasional in Leicestershire and Rutland. L&R Moth Group status = C (very scarce resident or rare migrant).