Video of Cecropia caterpillar pupating! Take a look inside a cecropia giant silk moth cocoon. After a caterpillar finishes spinning a cocoon it begins to transform, growing new structures beneath its skin. Eventually, it sheds its old caterpillar skin away and becomes the pupa. Many think of the moment when a butterfly or moth emerges from its pupa as the most dramatic transformation in metamorphosis. We feel differently. As the caterpillar skin sheds away and the pupa comes into view, all larva