Caterpillars

Caterpillars

Observation - Caterpillars - UK and Ireland. Description: I'm rearing these caterpillars (they were found on this foodplant - https://www.ispotnature.org/comm

I'm rearing these caterpillars (they were found on this foodplant - https://www.ispotnature.org/communities/uk-and-ireland/view/observation/784711/plant).
The first photo was taken when they'd recently hatched and the second one was taken a few weeks later.