Ah, it's trying to merge into its surrounding s now
It's starting to move again - look at the horns on that!
This Puss Moth caterpillar caused quite a stir when I found it on a sallow bush at Dungeness back in the summer. Some species look better when not an imago and this is one of them. When I first saw it I showed my ignorance of the larvae of the UK by assuming it must be a hawk-moth. I suppose there are quite a few people out there who think that they know their moths as adults but who would struggle to identify them as larvae, chrysalis or eggs - I'm one of them.