The moth formerly known as Heringocrania unimaculella, now known as Eriocrania unimaculella – either way a tongue twister! – spends its larval stage developing within the leaves of Birch trees. And it poohs … a lot … pooh that Rob Edmunds, expert from the British Leafminers website, describes as ‘long strands of spaghetti’. There are several Eriocrania species that can be difficult to identify but Rob produced an excellent well-illustrated guide explaining how to separate them in his March 2018 newsletter (click to access). The adult moth is a tiny golden critter, which you can see on the UK Moths website.