Butterfly Life Cycle.

What happens during the fourth stage?

The caterpillar changes into a colourful adult butterfly. When it first emerges, its wings are soft and folded against its body because it had to fit inside the pupa. The butterfly rests and then blood pumps into its wings and they start working and flapping. The butterfly usually learns to fly in 3 or 4 hours. The adults also mate and the female butterflies lay eggs, beginning the life cycle again.