Cinnabar Moth larvae

I leave some Ragwort to flower to accommodate Cinnabar moth larvae but I haven't seen any of the distinctive caterpillars for a few years although I did spot an adult in flight last July. Whilst at a friend's house in the next village I was shown scores of the caterpillars so I was able to take four and restock our site. They are now happily feeding away from the crowded Ragworts where they came from.