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WHAT'S SPECIAL:

 

The species and/or habitats of European importance are known as ‘features’. Species are dependent, at least in part, on supporting habitats; these are called ‘sub-features’ in the Conservation Objectives for the Severn Estuary EMS. The features and sub-features for each of the designations on the Estuary are shown below:
Severn Estuary SPA
Severn Estuary Ramsar
Severn Estuary pSAC

Severn Estuary SPA
Features Sub features
Internationally important populations of regularly occurring Annex 1 species: Bewicks swan Intertidal mudflats and sandflats
Saltmarsh
Shingle and rocky shore
Internationally important populations of 5 regularly occurring migratory bird species:
Shelduck, Dunlin, Redshank, European white-fronted goose, Gadwall
Intertidal mudflats and sandflats
Saltmarsh
Shingle and rocky shore
Internationally important assemblage of wintering waterfowl Intertidal mudflats and sandflats
Saltmarsh
Shingle and rocky shore

Severn Estuary Ramsar
Criterion 1 Immense tidal range affecting physical environment and biological communities
Criterion 2a Unusual estuarine communities, reduced species diversity and high productivity
Criterion 2b Important for the run of migratory fish between the sea and rivers via the estuary
Important for migratory birds during passage periods in spring and autumn
Criterion 3a Regularly supporting in winter over 20 000 waterfowl
Criterion 3c Regularly supporting, during the same period, internationally important populations of five species of waterfowl
Severn Estuary pSAC
Habitats and/or Species Reason for Selection
Alosa alosa (Allis Shad) For which the area is considered to support a significant presence
Alosa fallax (Twaite Shad) For which this is considered to be one of the best areas in the UK
Atlantic salt meadows For which this is considered to be one of the best areas in the UK
Estuaries For which this is considered to be one of the best areas in the UK
Lampetra fluviatilis (River Lamprey) For which this is considered to be one of the best areas in the UK
Mudflats and sandflats not covered by seawater at low tide For which this is considered to be one of the best areas in the UK
Petromyzon marinus (Sea lamprey) For which this is considered to be one of the best areas in the UK
Reefs For which the area is considered to support a significant presence
Sandbanks For which this is considered to be one of the best areas in the UK

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