Last modified: Feb. 18, 2020, 8:07 a.m.
A rather common species in Belgium.
The adults fly probably in two generations a year: late April-May and July-August. The larvae of September-October are more numerous, so it's possible that there is only one generation with a minority of individuals emerging and reproducing ahead of the rest.
The larva makes a leafmine usually on Rubus but also on Agrimonia, Fragaria, Filipendula, Geum and Potentilla. Usually a very long sinuous gallery with broken linear frass or if dispersed only one third of mine width. Grey-brown to greenish cocoon.