One day the Monarch butterfly will come and lay her eggs on the underside of the milkweed leaf. She lays hundreds of eggs in a few days the egg will get darker and darker. Finally it is ready to hatch and it bite a little inside the egg to get out. When it is out it turns around and eats the egg. The egg gives the caterpillar protein and vitamins. The caterpillar is an eating machine.
Caterpillars shed their skins several times and each skin they shed marks a new life stage. Once they are big and fat they prepare to shed their skin once more but under that skin there will be a pupa (Chrysalis) and they have to find a underside of a twig to start to transform to a butterfly.
Monarch Caterpillar begins its pupation and begins to make a caterpillar sleeping bag. After a few weeks the new butterfly emerges. He or she comes out of their shell and has to wait for an hour or more to pump fluid through his whole body.
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