Wingspan about 20 mm.  Rather plain in appearance, but often showing a slightly paler tornal blotch.

Gen det required for this species.

Inhabits damp habitats, along streams, river banks and lakesides where the foodplant, alder grows.

The adult moths fly from August to October.

The larvae feed in a folded leaf of Alder causing the leaf to become puckered, and later rolls a leaf into a pod. 

Widespread but local and rather infrequent in Britain. In the Butterfly Conservation's Microlepidoptera Report 2011 this species was classified as Nationally Scarce B.

Rarely recorded in Leicestershire and Rutland. A Barrowden record of 07/10/2021 was only the third for VC55.