We’ve had a break from leafmines for a while but now the leaves are once again green and lush, it’s time to check them for signs of the mines of munching moth and fly and beetle larvae.
Today’s example is a new one for me: Agromyza anthracina, a fly whose larvae thrive on Nettles. It’s common in England and, though there aren’t many Welsh records, it seems that’s because it’s under-recorded rather than rare. Since a Twitter friend found mines on Nettles in a local park last week, I’ve found mines in several locations on my walks.
I’ve lightened these images a lot to try to show more clearly the details of the mines: some are quite intestinal in design and the frass in the galleries is like a child’s scribble pattern.