There's a widely publicized example where wolves were reintroduced in a national reserve (Yellowstone National Park). The ecological effects were dramatic. Here

There's a widely publicized example where wolves were reintroduced in a national reserve (Yellowstone National Park). The ecological effects were dramatic. Here's a quick video on it (jump to 2:35 for an even quicker viewing): https://www.youtube.com/watch?v=gc52l5ZcAJ0 https://www.youtube.com/watch?v=gc52l5ZcAJ0