The butterfly and moth develop through a process called metamorphosis. This is a Greek word that means transformation or change in shape.

Insects have two common types of metamorphosis. Grasshoppers, crickets, dragonflies, and cockroaches have incomplete metamorphosis. The young (called a nymph) usually look like small adults but without the wings.

Butterflies, moths, beetles, flies and bees have complete metamorphosis. The young (called a larva instead of a nymph) is very different from the adults. It also usually eats different types of food.

There are four stages in the metamorphosis of butterflies and moths: egg, larva, pupa, and adult.