Can anyone help identify this insect? It is about 2.5-3cm long andhas six smooth black legs under the lower fringe, which I could not photograph.
Super duper - dead leaf mimicry does not come much better than this.
This is the superb Lappet moth, Gastropacha quercifolia (Lepidoptera: Lasiocampidae), which is not a common moth in the UK, local in the south and south east. Probably more widespread in France.
I have to think the moth is trying to mimic a dead beech leaf.
Its dark palps and the dark leading edge to the forewing are dead ringers for the petiole and midrib of a beech leaf, like these ones:
It needs to work on some other aspects, but I'm still impressed.
I know its specific name 'quercifolia' pertains to oak leaves, but personally I still see more of a beech leaf.