Lucinda Manouch (June)
I spotted this mass of black, short spined, white speckled Caterpillars in a bunch of nettles on my way into work.
The female Peacock butterfly lays batches of up to 500 eggs at one time and after a week or two the caterpillars hatch and spin a communal web (which you can just see in the background) in which the live and feed.
They will shortly pupate and emerge as adults in July. When their main priority is to feed-up before winter hibernation in a dark crevice, shed or tree hole. Adults emerge again in Spring to mate and breed and it all starts all over again.