Quote:
Originally Posted by Circa89
It is a birch leaf mining sawfly. A close relative of wasps and bees (Hymenoptera). No stingers, just an ovipositor for depositing eggs deep inside a birch leaf. They do have biting mouthparts but would not bite a human.
The worst they do is wreck your birch tree.

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That would make sense, there are a bunch of Birch trees in the middle of our street