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Location United Kingdom, South East
Central coordinates 0o 51.85' East  51o 49.51' North
IBA criteria A4iii, B1i, C3, C4
Area 716 ha
Altitude 10 - 20m
Year of IBA assessment 2007

Royal Society for the Protection of Birds

Site description This reservoir was created following the flooding of a long shallow valley, and supports fringing reed Phragmites and Salix swamp. Water is pumped mainly from the River Stour, 14 km to the north.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Northern Shoveler Spatula clypeata winter  2001-2006  419 individuals  good  B1i, C3  Least Concern 
A4iii Species group - waterbirds passage  2001-2006  21,378 individuals  good  A4iii, C4   
A4iii Species group - waterbirds winter  2001-2006  22,232 individuals  good  A4iii, C4   

IBA Monitoring

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

Natural system modifications dams & water management/use - abstraction of surface water (domestic use) likely in short term (within 4 years) small area/few individuals (<10%) slow but significant deterioration low

Mareca strepera Gadwall 430 291 individuals 68 unfavourable
Spatula clypeata Northern Shoveler 685 419 individuals 62 unfavourable
Anas crecca Common Teal 4550 3286 individuals 73 near favourable
Phalacrocorax carbo Great Cormorant 505 370 breeding pairs 74 near favourable
Pluvialis apricaria Eurasian Golden Plover 3300 308 individuals 10 very unfavourable
Species group - waterbirds A4iii 36504 22232 individuals 61 unfavourable

Whole area of site (>90%) covered by appropriate conservation designation  No management plan exists but the management planning process has begun  Some limited conservation initiatives are in place  low 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Abberton Reservoir Site of Special Scientific Interest 718 is identical to site 716  
Abberton Reservoir Wetlands of International Importance (Ramsar) 726 is identical to site 716  


IUCN habitat Habitat detail Extent (% of site)
Grassland   -
Wetlands (inland) Standing freshwater; Water fringe vegetation  -
Artificial - terrestrial Arable land  -

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Abberton Reservoir. Downloaded from on 22/10/2016

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