|Active and vacated mines of Stigmella crataegella, 11th August|
|Active mine of Stigmella hybnerella, 11th August|
I also took a quick tour of the lower leaves on our Norway Maple and in ten minutes found 33 vacated mines of Stigmella aceris. This species was first noticed on the tree in 2016 (just a single mine) and has now been found on it each subsequent year. The moth appeared in the UK in the 1970s and has been slowly spreading, although the speed of that spread seems to have accelerated considerably over the past few years.
|Mine of Stigmella aceris with deceased larva, 11th August|