I found this beautiful Peacock butterfly caterpillar yesterday!
These long caterpillars hatch within 2 weeks, spin a silk web and feed gregariously on young nettle leaves.
Peocock butterflies lay their eggs in May, they will then hatch into caterpillars in June and make a chrysalis is late June to July before emerging as a butterfly shortly after!
Peocock butterflies are common all over the UK as seen in the graph below!
Young Naturalist: Izzy Fry 