UK051
Ouse Washes


IBA Criteria

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
Whooper Swan Cygnus cygnus LC winter 2003-2008 4,104 individuals A4i, B1i, B3, C2, C6
Tundra Swan Cygnus columbianus LC winter 2003-2008 5,336 individuals A4i, B1i, B2, C2, C6
Northern Shoveler Spatula clypeata LC winter 2003-2008 1,429 individuals B1i, C3
Gadwall Mareca strepera LC winter 2003-2008 1,233 individuals B1i, C3
Gadwall Mareca strepera LC breeding 2006 134 breeding pairs B1i, B2, C3
Eurasian Wigeon Mareca penelope LC winter 2003-2008 34,245 individuals A4i, B1i, C3
Northern Pintail Anas acuta LC winter 2003-2008 2,543 individuals B1i, C3
Common Teal Anas crecca LC winter 2003-2008 5,871 individuals B1i, C3
Black-tailed Godwit Limosa limosa NT winter 2001-2006 3,123 individuals B1i, C3
Ruff Calidris pugnax LC passage 2001-2006 176 individuals C6
Ruff Calidris pugnax LC winter 2001-2006 310 individuals C6
A4iii Species group - waterbirds n/a winter 2003-2008 76,412 individuals A4iii, C4

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


IBA Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2007 high near favourable medium
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 annual & perennial non-timber crops - agro-industry farming likely in short term (within 4 years) some of area/population (10-49%) moderate to rapid deterioration medium
Energy production and mining renewable energy likely in short term (within 4 years) small area/few individuals (<10%) moderate to rapid deterioration low
Natural system modifications dams & water management/use - small dams happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Pollution agricultural & forestry effluents - nutrient loads happening now majority/most of area/population (50-90%) slow but significant deterioration high
Pollution domestic & urban waste water - sewage happening now majority/most of area/population (50-90%) slow but significant deterioration high
Transportation and service corridors utility & service lines likely in short term (within 4 years) small area/few individuals (<10%) moderate to rapid deterioration low

Condition of key/trigger populations (state)
Scientific Common TargetPop ActualPop Units Remaining Result
Cygnus cygnus Whooper Swan 820 4104 individuals 100 favourable
Cygnus columbianus Tundra Swan 4690 5339 individuals 100 favourable
Spatula clypeata Northern Shoveler 765 1429 individuals 100 favourable
Mareca strepera Gadwall 155 134 breeding pairs 87 near favourable
Mareca strepera Gadwall 370 1233 individuals 100 favourable
Mareca penelope Eurasian Wigeon 28500 34245 individuals 100 favourable
Anas acuta Northern Pintail 1550 2543 individuals 100 favourable
Anas crecca 3690 5871 individuals 100 favourable
Limosa limosa Black-tailed Godwit 505 18 individuals 4 not assessed
Limosa limosa Black-tailed Godwit 1540 3123 individuals 100 favourable
Calidris pugnax Ruff 135 176 individuals 100 favourable
Calidris pugnax Ruff 135 310 individuals 100 favourable
Species group - waterbirds A4iii 62914 76412 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 A management plan exists but it is out of date or not comprehensive Some limited conservation initiatives are in place medium
For more information about IBA monitoring please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Ouse Washes Site of Special Scientific Interest (UK) 2,514 protected area overlaps with site 2,469
Ouse Washes Special Protection Area (Birds Directive) 2,493 is identical to site 2,447
Ouse Washes Site of Community Importance (Habitats Directive) 333 protected area overlaps with site 0
Ouse Washes Ramsar Site, Wetland of International Importance 2,469 protected area overlaps with site 2,469
Ouse Washes Nature Reserve 1,671 protected area overlaps with site 0
Ouse Washes RSPB Reserve 1,562 protected area contained by site 1,562

Habitats

IUCN Habitat Habitat detail Extent (% of site)
Grassland -
Wetlands (inland) Standing freshwater, Rivers and streams, Water fringe vegetation -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
agriculture -
nature conservation and research -
water management -
For further information about the land use classification please click here.


Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Ouse Washes. Downloaded from http://www.birdlife.org on 24/05/2022.