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]
^ ab"Deben Estuary citation"(PDF). Sites of Special Scientific Interest. Natural England. Archived from the original(PDF) on 4 May 2015. Retrieved 24 May 2017.
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