Severn Estuary

Site overview: The Severn Estuary is located between Wales and England in south-west Britain. It is a large estuary, made up of mud-flats and sand-flats. The site is really important during the spring and autumn migration periods for waders moving up the west coast of Britain, as they come to feed here. In winter this area is home to a large number of waterbirds, especially swans, ducks and waders.

Designation Status
Last Updated
6 June 2017
MPA Type
Special Protection Area
MPA Purpose
areas of the most important habitat for rare (listed on Annex I to the Directive) and migratory birds within the European Union


51° 29' 32" North,
2° 48' 30" West

Surface Area

245.06 km2
(94.62 mi.2 )

Iconic features protected by this site


  • Tidal rivers, Estuaries, Mud flats, Sand flats, Lagoons (including saltwork basins)
  • Salt marshes, Salt pastures, Salt steppes


  • Waterfowl assemblage


  • Common redshank (Tringa totanus) (Regularly occurring migratory species)
  • Dunlin (Calidris alpina alpina) (Regularly occurring migratory species)
  • Common shelduck (Tadorna tadorna) (Regularly occurring migratory species)
  • Gadwall (Anas strepera) (Regularly occurring migratory species)
  • Greater white-fronted goose (Anser albifrons albifrons) (Regularly occurring migratory species)