My wife noticed this on her trousers immediately after coming home - probably acquired after brushing past a bush. It's about one inch long, and does not move much - but when poked it will flex and appear to try to roll.

It looks for all the world like a stick - but I've googled "stick insect", and this doesn't seem to have enough (or the right kind of) legs.

We live in England, in a suburban setting. We both work in offices and don't have a lot of contact with nature.

Could it be a thorn moth larva?

Apologies for the quality of the photo; I can try to take a better one if it would help to get another angle.

What is this insect?

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    $\begingroup$ Yes, it's a Lepidoptera larvae of some kind. For instance, Biston betularia has stick-like larvae, and is found in the UK (also see Wikipedia: Bison betularia). $\endgroup$ – fileunderwater Nov 10 '15 at 20:53
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    $\begingroup$ I must say, I am impressed. This might be the most stick-like stick-like insect I have ever seen. Complete with ends that look like they broke off a longer stick. (I do not doubt it is an insect, if it moves when poked like you describe. I am really impressed.) $\endgroup$ – skymningen Nov 11 '15 at 14:13
  • $\begingroup$ I think this is an inchworm. See my answer here $\endgroup$ – рüффп Sep 13 '17 at 22:50

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