Most of the site is owned and managed by the Ministry of Defence. Natural England describes it as "extensive intertidal sand-silt flats, saltmarsh, beaches, grazing marshes, rough grass and scrubland". The flats are of international importance for nine species of wildfowl and waders, such as dark-bellied brent geese. Rare plants include soft hornwort and spiral tasselwood, and the site is also important for invertebrates, with 71 nationally rare species.[1]
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References
^ ab"Foulness citation"(PDF). Sites of Special Scientific Interest. Natural England. Retrieved 24 February 2016.
^"Map of Foulness". Sites of Special Scientific Interest. Natural England. Retrieved 24 February 2016.
^"Essex Estuaries". Joint Nature Conservation Committee. Retrieved 24 February 2016.