I was surprised this came out so well as it was a hastily taken shot! These caterpillars feed on the poisonous ragwort and become poisonous themselves so predators leave them alone. Not sure if they are harmful to us, but I wouldn’t pick up a hairy caterpillar!
Earth laughs in flowers 
What a capture. You can even see the hairs on the caterpillars.
I was surprised this came out so well as it was a hastily taken shot! These caterpillars feed on the poisonous ragwort and become poisonous themselves so predators leave them alone. Not sure if they are harmful to us, but I wouldn’t pick up a hairy caterpillar!