Caterpillar rescue

Slow-worm

I found a fat green caterpillar in a cocoon, attached inside my recycling bin lid, where's the best place for him?
I know they can survive outdoors, but the cocoon is really thin, so for now he's in a plastic pot with another over the top.

wild edges

It might just spin another cocoon in the pot. I disturbed one this time last year and kept it in the greenhouse until June when it finally emerged. Somewhere dry and cool is ideal.

Slow-worm

Thanks @wild edges