What creature lives in a cocoon for part of its life cycle?

The caterpillar, which is the larval stage of butterflies and moths, lives in a cocoon during part of its life cycle. After feeding and growing, the caterpillar enters a pupal stage, where it forms a protective casing called a chrysalis or cocoon. Inside, it undergoes metamorphosis, transforming into its adult form. This process allows the creature to emerge as a fully developed butterfly or moth.