There is almost every EurAsian animal in Chernobyl. Once humans fucked off, animals took over.
This happened very quickly during the early panny-D as well
The real lesson is that humans don't need to fuck off for this to happen, we just need to stop intervening so much in nature. People honestly can't seem to handle sitting idle, we run around doing as much stuff as we can because we don't know what "enough" means.