The butterfly goes through a four-stage lifecycle. The first stage is the egg. The female lays these round eggs close together. The eggs are usually laid on the leaves of plants. The second stage is the larva (caterpillar). When the egg hatches, the larva will get to work on the leaf it was laid on. In this stage, the larva does a lot of eating so it can get big and strong. The third stage is the pupa (chrysalis). As soon as the larva is done growing, they form themselves into a pupa. Inside the chrysalis, the larva is rapidly changing. In here, it changes from larva to butterfly, growing wings and changing their bodies. The final stage is the butterfly. When it emerges from the pupa, its wings are tight against its body. Blood needs to get to the wings before it can fly. Once they can fly, they look for a mate to make more eggs, so the life cycle can begin again.
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