|Phyllonorycter leucographella mine, Westcott 30th Dec|
|Back-lit image of the same mine|
In the second image above you can see the stripey larva inside the mine, resting against the mid-rib. Species which mine evergreen plants seem able to survive the winter like this and now is a good time to seek out Holm Oaks (Quercus ilex) whose leaves are often covered in active mines of Ectoedemia heringella. I've also found active mines of Stigmella aurella on Bramble leaves in January (there's an example here) although a check around the garden today produced only old vacated mines.