Recording method

Adults come to light or may be found resting on tree-trunks or fences.

Life cycle

Larvae are present June and August-November.  The larva initially mines the leaf then feeds externally.  Adults fly April-June, July-September.

Larval foodplants

Oak species or, occasionally, Hornbeam.

History

First record for Dumfries and Galloway was a leaf-mine from Loch Ken viaduct on 28 September 2017.