Arun Valley. 16/12/99; England; 529 ha; 50°55'N 000°31'W. SSSI. Consists of three SSSIs in an area of wet meadows on the floodplain of the River Arun between Pulborough and Amberley, subject to occasional flooding, dissected by a network of ditches, several of which support rich aquatic flora and invertebrate fauna. The site is of outstanding ornithological importance for wintering waterfowl and breeding waders. It supports seven wetland invertebrate species that are listed as threatened in Britain, one of which is endangered, and there are four nationally rare and four nationally scarce plant species. Much of the site is currently under appropriate management through organizations such as the Sussex Wildlife Trust and the RSPB, but influencing private landowners on management issues will continue to be important. Recreational activities include birdwatching and walking, and a visitor's center, bird hides, and a tea shop are present. Ramsar site no. 1011. Most recent RIS information: 1999.