home and gardensRichard Collins: Cocooning is a useful survival strategy in wildlifeCOCOON comes from âcoqueâ, French for âegg shellâ. âUn oeuf Ă la coqueâ is a boiled egg and âse renfermer dans sa coqueâ is âto retreat into oneâs shellâ. For zoologists, a cocoon is the container protecting an insect during the adolescent stage of development.