Butterfly-Experiment

I have some withering monks cress on my balcony. I just didn't have the time to get rid of it jet. And I was really surprised to find some caterpillars grasing on it. A quick research revealed the species: Gonepteryx rhamni (Common Brimstone). I decided to get one of them and put it in an open jar with some leaves and a twig where it could build its chrysalis. Now I am waiting for it to happen. This is how it looks like today. It is approximately 5 cm long.

And here a picture of the jar itself.