A cocoon dweller is an organism that lives in a protective covering, usually made of silk. The PUPA is the stage of development between the LARVA and adult stages of some insects, such as moths. The LARVA is the immature form of an insect that hatches from an egg and must undergo metamorphosis before becoming an adult. The MOTH is an insect that typically has a wingspan of 2-3 inches and is known for its ability to spin a silky cocoon.