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 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 Channel (). The estuary is a ria and so is larger than would be the case given the size of the River Exe, the main river feeding into the estuary. On the east shore (from north to south) are the town of Topsham, the villages of Exton and Lympstone and at the estuary mouth, the seaside resort of Exmouth. Opposite Exmouth