Deben Estuary

Site of Special Scientific Interest
Location	Suffolk
Grid reference	TM 296 434[1]
Interest	Biological
Area	981.1 hectares[1]
Notification	1991[1]
Location map	Magic Map

Deben Estuary SSSI is a 981.1-hectare (2,424-acre) biological Site of Special Scientific Interest (SSSI) covering the River Deben and its banks 12 kilometres (7.5 miles) from its mouth north of Felixstowe to Woodbridge in Suffolk.^[1][3] It is a Ramsar internationally important wetland site^[4][5] and a Special Protection Area under the European Union Directive on the Conservation of Wild Birds.^[6][7] It is also in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.^[8] It partly overlaps two geological SSSIs, Ferry Cliff, Sutton and Ramsholt Cliff.^[9]

The site has been designated an SSSI for its overwintering waders and wildfowl, and for its diverse saltmarshes. It has internationally important overwintering redshanks and nationally important numbers of dark-bellied brent geese, shelducks and black-tailed godwits. The estuary also has three nationally rare plants and a nationally rare mollusc.^[9]

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52°02′N 1°21′E / 52.04°N 1.35°E / 52.04; 1.35