Early leaf mines

 

My first finds this year of several Phyllonorycter esperella, the Dark Hornbeam Midget, on the upper-surface of the leaves of Hornbeam, Carpinus betulus. 

This could perhaps be Stigmella lapponica, on what looks like Downy Birch, Betula pubescens, whose egg should be on the underside of the leaf, but Stigmella confusella is another possibility with its egg on the upperside of the leaf