This is the third caterpillar ready to become a chrysalis. He climbed up in the habitat where my my caterpillars live, so he had to move to the habitat where there are already 2 chrysalis.
He climbed happily on a totally eaten milkweed stem. And my husband was happy to hold it in order for me to take a photo.
The reason that I move the caterpillars ready to 'transform' is that in the past I had one blocking the entrance to the habitat. The caterpillars need fresh milkweed and that became quite complicated.