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 | 25 individuals | C6 |
| Gadwall Mareca strepera | LC | winter | 2001-2006 | 690 individuals | B1i, C3 |
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 | high | low |
| 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 | 170 | 25 | individuals | 15 | very unfavourable |
| Gadwall Mareca strepera | 665 | 690 | individuals | 100 | favourable |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Agricultural expansion and intensification | happening now | majority/most of area/population (50-90%) | slow but significant deterioration | high |
| Natural system modifications | happening now | majority/most of area/population (50-90%) | slow but significant deterioration | high |
| Invasive and other problematic species and genes | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
| Pollution | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
| Human intrusions and disturbance | happening now | small area/few individuals (<10%) | slow but significant deterioration | low |
| Energy production and mining | 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 | Unknown | Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity | low |
| Year | Protected Area | Designation | % overlap with IBA |
|---|---|---|---|
| 1987 | Avon Valley | Special Protection Area (Birds Directive) | 100 |
| 1993 | Avon Valley ( Bickton To Christchurch ) | Site of Special Scientific Interest (UK) | 100 |
| 1996 | River Avon System | Site of Special Scientific Interest (UK) | 5 |
| 1998 | Avon Valley | Ramsar Site, Wetland of International Importance | 100 |
| 1998 | River Avon | Site of Community Importance (Habitats Directive) | 8 |
| Habitat1 | Habitat detail | % of IBA |
|---|---|---|
| Artificial/Terrestrial | Highly improved re-seeded landscapes, Arable land | - |
| Forest | Broadleaved deciduous woodland, Mixed woodland | - |
| Grassland | Humid grasslands | - |
| Wetlands (inland) | Standing freshwater, Rivers and streams, Water fringe vegetation, Fens, transition mires and springs | - |
| Land use | % of IBA |
|---|---|
| agriculture | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Avon Valley (United Kingdom). Downloaded from
https://datazone.birdlife.org/site/factsheet/avon-valley-iba-united-kingdom on 23/11/2024.