Dengie (Mid-Essex Coast Phase 1)

Site overview: This site is on the coast of Essex in eastern England. It is a large and remote area of tidal mud-flats and saltmarshes. Over the winter months it is an area that hen harriers, wildfowl and waders flock to. This is an integral component of the phased Mid-Essex Coast Special Protection Area (a type of Marine Protected Area).

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° 41' 31" North,
0° 57' 18" East

Surface Area

31.33 km2
(12.10 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


  • Red knot (Calidris canutus) (Regularly occurring migratory species)
  • Grey plover (Pluvialis squatarola) (Regularly occurring migratory species)
  • Dark-bellied brent goose (Branta bernicla bernicla) (Regularly occurring migratory species)
  • Hen harrier (Circus cyaneus) (Annex I (species))