The Caledonian Forest once covered a large area of the Highlands of Scotland as extensive stands of majestic Scots pine, interspersed with birch, rowan, juniper and aspen trees, but is now reduced to about 2% of its former extent. Through planting native species of trees, removing non-native species and fencing seedlings to protect them from overgrazing by deer and sheep, Trees for Life aims to help the natural regeneration of the forest. Its long-term goal is to create a fully restored, healthy ecosystem, with the reintroduction of missing species of wildlife, such as the beaver, wild boar, lynx and wolf.