Beyond caring for animals within their walls, zoos contribute to ecosystem restoration through reintroduction programs. Species like the European bison, the Przewalski's horse, and the Arabian oryx have been successfully reintroduced into the wild, thanks to captive breeding and careful planning by zoos and conservation organizations. These programs require extensive preparation, as animals need to be carefully adapted to their natural environments and taught survival skills. Such initiatives help rebuild ecosystems, as the reintroduced animals often play crucial roles in their habitats, like grazing or regulating prey populations. By bringing species back to their native landscapes, zoos help restore natural balance and support biodiversity, ensuring that entire ecosystems thrive.