Data Zone
Year of most recent IBA criteria assessment: 2007
Populations of IBA trigger species| Species | Current IUCN Red List Category | Season | Year(s) of estimate | Population estimate | IBA Criteria Triggered |
|---|---|---|---|---|---|
| Tundra Swan Cygnus columbianus | LC | winter | 2001-2006 | 25 individuals | C6 |
| Gadwall Mareca strepera | LC | winter | 2001-2006 | 690 individuals | B1i, C3 |
Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.
For more information about the IBA assessment process and criteria please click here
| Most recent IBA monitoring assessment | |||
|---|---|---|---|
| Year of assessment | Threat score (pressure) | Condition score (state) | Action score (response) |
| 2007 | high | very unfavourable | low |
| Was the whole site covered? | Yes | State assessed by | Population |
| Accuracy of information | good | ||
| Threats to the site (pressure) | |||||
|---|---|---|---|---|---|
| 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 | majority/most of area/population (50-90%) | slow but significant deterioration | high |
| Agricultural expansion and intensification | wood and pulp plantations (includes afforestation) - small-holder plantations | happening now | small area/few individuals (<10%) | slow but significant deterioration | low |
| Energy production and mining | mining and quarrying | happening now | small area/few individuals (<10%) | slow but significant deterioration | low |
| Human intrusions and disturbance | recreational activities | happening now | small area/few individuals (<10%) | slow but significant deterioration | low |
| Invasive and other problematic species and genes | invasive non-native/alien species/diseases - unspecified species | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
| Invasive and other problematic species and genes | problematic native species/diseases - unspecified species | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
| Natural system modifications | dams & water management/use - abstraction of surface water (agricultural use) | happening now | majority/most of area/population (50-90%) | slow but significant deterioration | high |
| Natural system modifications | other ecosystem modifications | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
| Pollution | agricultural & forestry effluents - soil erosion, sedimentation | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
| Pollution | agricultural & forestry effluents - type unknown/unrecorded | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
| Pollution | domestic & urban waste water - sewage | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
| Condition of key/trigger populations (state) | ||||||
|---|---|---|---|---|---|---|
| Scientific | Common | TargetPop | ActualPop | Units | Remaining | Result |
| Cygnus columbianus | Tundra Swan | 170 | 25 | individuals | 15 | very unfavourable |
| Mareca strepera | Gadwall | 665 | 690 | individuals | 100 | favourable |
| Conservation actions taken at site (response) | |||
|---|---|---|---|
| Conservation Designation | Management Planning | Conservation 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 |
| Protected Area | Designation | Area (ha) | Relationship with IBA | Overlap with IBA (ha) |
|---|---|---|---|---|
| The New Forest | Site of Special Scientific Interest (UK) | 28,945 | protected area is adjacent to site | 0 |
| Stanpit Marsh, Christchurch | Local Nature Reserve | 55 | protected area is adjacent to site | 0 |
| River Avon System | Site of Special Scientific Interest (UK) | 476 | protected area overlaps with site | 0 |
| River Avon | Site of Community Importance (Habitats Directive) | 417 | protected area overlaps with site | 0 |
| New Forest | National Park | 56,693 | protected area is adjacent to site | 1,348 |
| Ibsley and Rockford Commons | Nature Reserve | 542 | protected area is adjacent to site | 0 |
| Dorset Heaths | Site of Community Importance (Habitats Directive) | 5,720 | protected area is adjacent to site | 0 |
| Dorset Heathlands | Special Protection Area (Birds Directive) | 8,185 | protected area is adjacent to site | 0 |
| Christchurch Harbour | Site of Special Scientific Interest (UK) | 352 | protected area is adjacent to site | 0 |
| Avon Valley ( Bickton To Christchurch ) | Site of Special Scientific Interest (UK) | 1,405 | protected area overlaps with site | 1,348 |
| Avon Valley | Ramsar Site, Wetland of International Importance | 1,385 | protected area overlaps with site | 1,348 |
| Avon Valley | Special Protection Area (Birds Directive) | 1,351 | is identical to site | 1,346 |
| IUCN Habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Forest | Broadleaved deciduous woodland, Mixed woodland | - |
| Grassland | Humid grasslands | - |
| Wetlands (inland) | Standing freshwater, Rivers and streams, Water fringe vegetation, Fens, transition mires and springs | - |
| Artificial/Terrestrial | Highly improved re-seeded landscapes, Arable land | - |
| Land-use | Extent (% of site) |
|---|---|
| agriculture | - |
Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Avon Valley. Downloaded from
http://www.birdlife.org on 10/08/2022.
