South Thames Estuary and Marshes South Thames Estuary and Marshes South Thames Estuary and Marshes is a biological Site of Special Scientific Interest which stretches between Gravesend and the mouth of the River Medway in Kent. Part of it is a Nature Conservation Review site, Grade I, and part is a Royal Society for the Protection of Birds nature reserve. It is part of the Thames Estuary and Marshes Ramsar internationally important wetland site and Special Protection Area under the European Union Directive on the Conservation of Wild Birds. Over 20,000 waterfowl use this site, and some species are present in internationally important numbers. There
Exe Estuary food for Eurasian oystercatchers ("Haematopus ostralegus"). The estuary is the only British location for the polychaete worm "Ophelia bicornia". The Exe Valley Way Footpath runs south from Starcross, Northwards through the whole of the Exe estuary, and further north to the heights of Exmoor, ending at the source of the River Exe - Exe Head. The route covers almost 50 miles. Exe Estuary The Exe estuary is an estuary on the south coast of Devon, England. The estuary starts just to the south () of the city of Exeter, and extends south for approximately eight miles to meet the English