First comes the egg, then the egg haches into a caterpillar larva. Then the larva keeps eating and eating leaves. It grows fat! Then it raps itself into a cucoun. After a long time, a beautiful butterfly comes out of the cucoun. And the cycle starts all over agen!
Have you seen a cucuon?
Fun Fact: A butterfly flys to Mexico when it gets colder in the U.S.!