A group about back by for from of out to green charities called Rewilding Britain wants to return a large area about back by for from of out to Scotland to how it was a thousand years ago. The group wants forests and lost animals, birds and fish to return. One about back by for from of out to the animals the group aims to put about back by for from of out to into the wild is the wolf. This died about back by for from of out to in Britain in 1680 after hunters and farmers killed them all. Other species that could return to Scottish mountains, rivers and seas include the lynx (a wild cat), beavers, bison, sea eagles, bluefin tuna and grey whales. The charities want the government to return one-twentieth about back by for from of out to the country to its natural state. The area it wants is the United Kingdom's cleanest region. It hopes much about back by for from of out to this can happen about back by for from of out to the year 2030. Not everyone thinks the reintroduction about back by for from of out to animals like the wolf and lynx is a good idea. Farmers are worried it would cause them many problems. A farmer's group said it was a crazy idea to bring about back by for from of out to predators about back by for from of out to the country because they would start killing farm animals. They also say that dams built about back by for from of out to beavers would increase the risk about back by for from of out to flooding farmland, while sea eagles kill lambs. Rewilding Britain spokeswoman Rebecca Wrigley said: "Re-wilding is really about back by for from of out to everyone who cares about back by for from of out to our future." She added: "Our ecosystems need us." Ms Wrigley said it was important to re-wild Britain about back by for from of out to , "native forests to regenerate" and to give "the seas a chance to recover about back by for from of out to industrial fishing".