UK003
Arun Valley


IBA Justification

The site was identified as important in 2007 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):
Species Current IUCN Red List Category Season Year(s) Population estimate at site IBA criteria met
Tundra Swan Cygnus columbianus LC winter 2001-2006 44 individuals C6

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2007).


IBA Conservation

IBA conservation assessment
Year of assessment (most recent) State (condition) Pressure (threat) Response (action)
2007 very unfavourable low medium
Was the whole site assessed? State assessed by Accuracy of information
yes population good

State (condition of the trigger species' populations)
Scientific name Common name Reference population Actual population Units % of population remaining Result
Cygnus columbianus Tundra Swan 71 44 individuals 62 unfavourable
Calidris pugnax Ruff 99 27 individuals 28 very unfavourable
Species group - waterbirds A4iii 37776 13337 individuals 36 very unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat level 1 Threat level 2 Timing Scope Severity Result
Agricultural expansion and intensification livestock farming and ranching (includes forest grazing) - small-holder grazing, ranching or farming happening now small area/few individuals (<10%) slow but significant deterioration low
Natural system modifications dams & water management/use - abstraction of surface water (unknown use) happening now small area/few individuals (<10%) slow but significant deterioration low
Pollution domestic & urban waste water - sewage happening now small area/few individuals (<10%) slow but significant deterioration low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation Management planning Other conservation action Result
Whole area of site (>90%) covered by appropriate conservation designation A management plan exists but it is out of date or not comprehensive Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity medium
For more information about IBA conservation status, please click here

IBA Protection

Protected area (PA) PA designation PA area (ha) Relationship of PA with IBA Overlap of PA with IBA (ha)
Waltham Brooks Site of Special Scientific Interest (UK) 47 protected area overlaps with site 0
Sussex Downs Area of Outstanding Natural Beauty 98,300 protected area overlaps with site 1,110
South Downs National Park 165,351 protected area contains site 1,413
Pulborough Brooks Site of Special Scientific Interest (UK) 160 protected area overlaps with site 159
Pulborough Brooks RSPB Reserve 257 protected area overlaps with site 175
Pulborough Brooks Nature Reserve 257 protected area overlaps with site 0
Arundel Park Site of Special Scientific Interest (UK) 134 protected area overlaps with site 0
Arun Valley Site of Community Importance (Habitats Directive) 487 protected area contained by site 0
Arun Valley Special Protection Area (Birds Directive) 530 protected area contained by site 529
Arun Valley Ramsar Site, Wetland of International Importance 529 protected area overlaps with site 529
Arun Banks Site of Special Scientific Interest (UK) 26 protected area overlaps with site 0
Amberley Wildbrooks Nature Reserve 213 protected area overlaps with site 0
Amberley Wildbrooks RSPB Reserve 213 protected area overlaps with site 196
Amberley Wild Brooks Site of Special Scientific Interest (UK) 328 protected area contained by site 323

Habitats

Habitat (IUCN level 1) Habitat detail Extent (% of site)
Forest Broadleaved deciduous woodland, Mixed woodland -
Shrubland Scrub -
Grassland Humid grasslands -
Wetlands (inland) Rivers and streams, Fens, transition mires and springs -
Artificial/Terrestrial Arable land -
For more information about the IUCN Habitat classification, please click here.

Land use

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


Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Arun Valley. Downloaded from https://datazone.birdlife.org/site/factsheet/arun-valley-iba-united-kingdom on 26/02/2024.