The Flow Country is a large, rolling expanse of peatland and wetland area of Caithness and Sutherland in Scotland. It is the largest expanse of blanket bog in Europe, and covers about 4,000 square kilometres (1500 mile2). The area is home to a rich variety of wildlife, and is used as a breeding ground for many different species of birds, including greenshank, dunlin, merlin and golden plover.