Tags
British leafminers, British sawflies, leaf-mining sawfly larvae, leafminers on Birch, sawfly larvae on Birch
Staring at the leaves of young Birch trees paid off once again when I recently spotted these large blotches.

They were made by the larvae of Scolioneura betuleti, a small black sawfly – you can see a photo of the adult on The Sawflies of Britain and Ireland website. The larvae are active in early summer and again in the autumn – the British Leafminers website has images of the distinctive larvae.



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