The Surrey Hills is one of the most wooded AONBs, with almost 40% woodland cover, and woodland is perhaps now the defining feature of the Surrey Hills landscape. The woodland is diverse, including shaws, old coppice, wooded ghylls, parkland trees, small carrs and conifer plantation. Ancient semi-natural woodland has particular significance in terms of historic and nature conservation importance. The yew and box woodlands on the North Downs are of international importance.