Data Zone
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') at the site:| Species | Red List1 | Season | Year(s) | Size | IBA criteria |
|---|---|---|---|---|---|
| Tundra Swan Cygnus columbianus | LC | winter | 2001-2006 | 44 individuals | C6 |
1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2007) may differ.
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2007. The most recent assessment (2007) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2007 | very unfavourable | low | medium |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | population | good | |
| State (condition of the trigger species' populations) | |||||
|---|---|---|---|---|---|
| Species | Reference | Actual | Units | % remaining | Result |
| Tundra Swan Cygnus columbianus | 71 | 44 | individuals | 62 | unfavourable |
| Ruff Calidris pugnax | 99 | 27 | individuals | 28 | very unfavourable |
| A4iii Species group - waterbirds | 37,776 | 13,337 | individuals | 36 | very unfavourable |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Natural system modifications | happening now | small area/few individuals (<10%) | slow but significant deterioration | low |
| Agricultural expansion and intensification | happening now | small area/few individuals (<10%) | slow but significant deterioration | low |
| Pollution | 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 areas | Management plan | Other 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90%) covered by appropriate conservation designation | A management plan exists but it is out of date or not comprehensive | Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity |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 |
| Year | Protected Area | Designation | % overlap with IBA |
|---|---|---|---|
| - | Pulborough Brooks | RSPB Reserve | 12 |
| - | Amberley Wildbrooks | RSPB Reserve | 14 |
| 1966 | Sussex Downs | Area of Outstanding Natural Beauty | 79 |
| 1985 | Amberley Wild Brooks | Site of Special Scientific Interest (UK) | 23 |
| 1985 | Arun Banks | Site of Special Scientific Interest (UK) | 1 |
| 1987 | Waltham Brooks | Site of Special Scientific Interest (UK) | 2 |
| 1987 | Arundel Park | Site of Special Scientific Interest (UK) | <1 |
| 1989 | Pulborough Brooks | Nature Reserve | 14 |
| 1997 | Amberley Wildbrooks | Nature Reserve | 14 |
| 1998 | Arun Valley | Special Protection Area (Birds Directive) | 37 |
| 1998 | Pulborough Brooks | Site of Special Scientific Interest (UK) | 11 |
| 1999 | Arun Valley | Ramsar Site, Wetland of International Importance | 37 |
| 2010 | South Downs | National Park | 100 |
| 2012 | Arun Valley | Site of Community Importance (Habitats Directive) | 34 |
| Habitat1 | Habitat detail | % of IBA |
|---|---|---|
| Artificial/Terrestrial | Arable land | - |
| Forest | Broadleaved deciduous woodland, Mixed woodland | - |
| Grassland | Humid grasslands | - |
| Shrubland | Scrub | - |
| Wetlands (inland) | Rivers and streams, Fens, transition mires and springs | - |
| Land use | % of IBA |
|---|---|
| agriculture | - |
| forestry | - |
| tourism/recreation | - |
| nature conservation and research | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Arun Valley (United Kingdom). Downloaded from
https://datazone.birdlife.org/site/factsheet/arun-valley-iba-united-kingdom on 24/11/2024.