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When I spotted this caterpillar yesterday, I didn’t think I’d seen one like it before but, when one of my Twitter pals later identified it for me, I realised I had seen one previously, though a younger model.

These are the larvae of the Knot grass moth (Acronicta rumicis), a moth I’ve never seen (you can see what the adult moth looks like and read more about it on the UK Moths website). I think the larva above, found munching on Dyer’s greenweed at Cosmeston on 4 June, is an early instar, whereas the larva below, found feeding on Common ragwort at Lavernock Nature Reserve on 10 September and a real stunner, is almost ready to pupate for the winter.

200911 knot grass larva (3)