Stigmella sakhalinella

Had a pop down to Copley today to see the instalment of the bridge at North Dean after the last one was severely damaged by the Boxing day floods. On route I stopped off at Copley meadow and got caught out in a torrential downpour. Whilst sheltering under a Silver Birch tree I noticed this mine. Straight away I knew it was something good - the coiled, brown frass throughout is a dead giveaway. Unheard of in Yorkshire until 2010 it's still quite rare but I suspect more people are aware of it and searching for it.