The curse of caged birds refers to the curse imposed by the Ministry of Magic on wizards and witches who have committed legal crimes in Harry Potter novels and movies. Through this curse, the caster can control the actions of the spell holder and limit his ability to use magic. In novels and movies, the curse of caged birds can be lifted by magic, but it requires certain magical ability and skill.
Although this mantra is fictional in novels and movies, in reality, some countries and regions have similar monitoring and restriction measures, such as electronic supervision, residence restrictions, community services and so on.