on the south bank of the river below fosdyke bridge, the lincolnshire wildlife trust have established moulton marsh nature reserve, on a strip of land where soil was excavated to raise the banks in 1981. habitat is provided by some broad-leafed woodland, covering , several salt-water lagoons and tidal scrapes, covering , and of saltmarsh. a variety of birds can be seen, including little grebe and water rail, which spend the winter on the lagoons, while the scrapes, which consist of shallow pools and muddy shorelines, are visited by common redshank and little egret.