The caterpillar escaped from the bowl I had it in because it knew it was "time" to make it chrysalis. It attached itself to the edge of the bookcover upon which the bowl was placed. I watched it shed its skin of yellow and black stripes and form its chrysalis. Look at the beautiful gold beads, almost like a necklace, that it made. I am closely watching it because I want to be able to release the butterfly in the garden. Nature is wondrous.