After the caterpillar molts one last time, it makes a chrysalis. A chrysalis is not the same as a cocoon. The monarch caterpillar attaches its back end (posterior) to a support, and hangs downward in the shape of the letter 'J'. The inside of the caterpillar's body begins to change and it splits its skin to form the blue-green chrysalis. The blue-green chrysalis has a band of black and bright gold near the top. There are other gold spots lower down. After spending many weeks in the chrysalis, the adult finally comes out as a butterfly.