What's That Bug? does not endorse extermination

Subject: What is this bug?
Location: Hatfield Forest UK
February 19, 2017 9:56 am
Good evening
We saw these bugs under tree bark of felled tree in Hatfield forest.
Do you know what it is please?
Thank you
Signature: Claire

Ichneumons

Dear Claire,
Though your image lacks critical detail, we are relatively confident these are parasitoid Ichneumon Wasps.  Some species feed on wood boring insects, which may explain their presence under the bark of a felled tree.  This images from Nature Spot of
Achaius oratorius look similar.  Ichneumon stramentor, also on Nature Spot, looks like an even better match.  According to Nature Spot:  ” The larva parasitise the Large Yellow Underwing and Setaceous Hebrew Character moth caterpillars (possibly others), the adult wasp lays its eggs inside the caterpillar, the developing larva then eats it from the inside.”  You can also find some interesting information on Paul’s Back Garden Safari.

Ichneumon

 

What's That Bug? does not endorse extermination
Location: Hatfield Forest, UK

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