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Location United Kingdom, South East,South West
Central coordinates 1o 47.97' West  50o 47.21' North
IBA criteria B1i, C3, C6
Area 1,348 ha
Altitude 3 - 25m
Year of IBA assessment 2007

Royal Society for the Protection of Birds



Site description The IBA comprises about 20 km of the Avon valley, the flood-plain of which contains a variety of habitats. The river itself is probably the most diverse chalk river system in the UK, with an aquatic flora that includes important Ranunculus beds, reflecting its chalk and acid qualities. Adjacent hay-meadows also support a rich flora. Meadows, fen and carr attract a wide range of wintering and breeding wetland birds, with heathland species breeding in adjacent areas.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Tundra Swan Cygnus columbianus winter  2001-2006  25 individuals  good  C6  Least Concern 
Gadwall Mareca strepera winter  2001-2006  690 individuals  good  B1i, C3  Least Concern 

IBA Monitoring

2007 high very unfavourable low
Population
Good - based on reliable and complete / representative data

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

Cygnus columbianus Tundra Swan 170 25 individuals 15 very unfavourable
Mareca strepera Gadwall 665 690 individuals 100 favourable

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 areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Avon Valley Birds Directive 1,346 is identical to site 1,346  
Avon Valley Wetlands of International Importance (Ramsar) 1,385 is identical to site 1,348  
Avon Valley (Bickton to Christchurch) Site of Special Scientific Interest (SSSI) 605 protected area contained by site 605  
New Forest National Park 57,100 protected area contains site 1,348  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Forest Broadleaved deciduous woodland; Mixed woodland  -
Grassland Humid grasslands  -
Wetlands (inland) Fens, transition mires and springs; Rivers and streams; Standing freshwater; Water fringe vegetation  -
Artificial - terrestrial Arable land; Highly improved re-seeded landscapes  -

Land use

Land-use Extent (% of site)
agriculture -

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Avon Valley. Downloaded from http://www.birdlife.org on 28/12/2014

To provide new information to update this factsheet or to correct any errors, please email BirdLife