The adult of the cinnabar moth is day flying, and brightly coloured to show that it is unpalatable. The yellow and black stripes of the caterpillar serve the same purpose – young caterpillars are just yellow.
There were several caterpillars on this ragwort: their preferred food source.
The camera noise in these pictures is because I went out one night at sunset in search of badgers. I didn’t see any, so took this series instead.