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Location United Kingdom, South East
Central coordinates 0o 32.94' West  50o 54.31' North
IBA criteria C6
Area 1,413 ha
Altitude 15 m
Year of IBA assessment 2007

Royal Society for the Protection of Birds

Site description The Arun valley exhibits an unusual range of physical and chemical conditions and a correspondingly high diversity of flora and fauna. Alluvial grazing-marsh, pasture and cultivated land are all present, forming a mixed wet and dry field and ditch network that supports a rich floral community. It is an important site for wintering waterfowl and waders, and for breeding waterfowl.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Tundra Swan Cygnus columbianus winter  2001-2006  44 individuals  good  C6  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Amberley Wild Brooks Site of Special Scientific Interest 327 protected area contained by site 323  
Amberley Wildbrooks RSPB Reserve 213 protected area overlaps with site 196  
Arun Valley Birds Directive 529 protected area contained by site 529  
Arun Valley Wetlands of International Importance (Ramsar) 529 protected area contained by site 529  
Pulborough Brooks RSPB Reserve 257 protected area overlaps with site 175  
Pulborough Brooks Site of Special Scientific Interest 160 protected area contained by site 159  
South Downs National Park 0 protected area contains site 1,413  
Sussex Downs Area of Outstanding Natural Beauty 98,300 protected area overlaps with site 1,110  


IUCN habitat Habitat detail Extent (% of site)
Forest Broadleaved deciduous woodland; Mixed woodland  -
Shrubland Scrub  -
Grassland Humid grasslands  -
Wetlands (inland) Fens, transition mires and springs; Rivers and streams  -
Artificial - terrestrial Arable land  -

Land use

Land-use Extent (% of site)
agriculture -
forestry -
tourism/recreation -
nature conservation and research -

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Arun Valley. Downloaded from on 21/10/2014

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