Demonstrative example in practice of re-introduction of predators is the wolves in Yellowstone[0][1]. There are also studies which say that this instead destabilizes the ecosystem[2]. For what it's worth, I think more data from investigation is needed in more diverse ecosystems and including different scopes of time. [0]https://www.yellowstonepark.com/things-to-do/wildlife/wolf-r... [1]https://www.nps.gov/yell/learn/nature/wolf-restoration.htm [2]https://phys.org/news/2019-04-effects-reintroducing-predator...