Thanks to regular correspondent Bob for this great picture of a Large birch sawfly larva, that he found in Devon after felling a Silver birch tree. This isn't a caterpillar, though obviously it could easily be mistaken for one. It turns into a Large birch sawfly (picture of the adult on that page), a type of sawfly - which is a bit like a wasp but with a fatter waist.

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  1. That is a very bright colour. I suspect that Sawflies are not to be desired?

  2. Well they’re not especially harmful, but may be a pest apparently. I suppose it depends what you desire!

  3. This lerva looks so delicious… 😀

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