To identify these firstly you need to know the tree from which the leaf was taken and then each caterpillar makes a track that is often specific to that species. www.leafminers.co.uk is a most helpful site to help with identification.
I then spent time in local woods where I have run moth traps to add to the year list. Still have several larger woods to check in the next few days, before all the leaves disappear.
|Millennium Wood path|
|Guelder rose berries|
|Glorious morning in the wood|
|Leaf mine on hazel of Phyllonorycter coryli, the nut blister moth|
|On hazel, Phyllonorycter nicellii|
|Stigmella aceris on field maple|
|Several species have mined this hazel leaf.|