The caterpillar will shed its skin one last time and a chrysalis will form. Inside the chrysalis new cells grow to become a butterfly.
A chrysalis is like a small room where the caterpillar takes a nap and then it dies. Sometimes a chrysalis is called a cocoon.
This is where the magic takes place. The dead caterpillar cells become imaginal cells which grow and grow. Within a few days a butterfly emerges.
Watch another video to see how most of the caterpillar cells die and the imaginal cells begin to grow.
Click here to see what happens next.