UK018
Duddon Estuary


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
Northern Pintail Anas acuta LC winter 2001-2006 1,550 individuals B1i, C3
Eurasian Curlew Numenius arquata NT winter 2001-2006 2,190 individuals B2
Dunlin Calidris alpina LC winter 2001-2006 10,600 individuals B2
Common Redshank Tringa totanus LC passage 2001-2006 1,630 individuals B1i, C3
Common Redshank Tringa totanus LC winter 2001-2006 1,720 individuals B1i, C3
Little Tern Sternula albifrons LC breeding 2000 26 breeding pairs C6
Sandwich Tern Thalasseus sandvicensis LC breeding 2006 300 breeding pairs B2, C6
Sandwich Tern Thalasseus sandvicensis LC breeding 2000 340 breeding pairs B2, C6
A4iii Species group - waterbirds n/a winter 2001-2006 30,054 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 low 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
Natural system modifications other ecosystem modifications happening now small area/few individuals (<10%) slow but significant deterioration low

Condition of key/trigger populations (state)
Scientific Common TargetPop ActualPop Units Remaining Result
Anas acuta Northern Pintail 1550 1000 individuals 65 unfavourable
Charadrius hiaticula Common Ringed Plover 585 290 individuals 50 unfavourable
Numenius arquata Eurasian Curlew 2190 2044 individuals 94 favourable
Limosa lapponica Bar-tailed Godwit 315 83 individuals 27 very unfavourable
Calidris canutus Red Knot 5300 1235 individuals 24 very unfavourable
Calidris canutus Red Knot 3580 212 individuals 6 very unfavourable
Calidris alpina Dunlin 10600 6244 individuals 59 unfavourable
Tringa totanus Common Redshank 1630 1732 individuals 100 favourable
Tringa totanus Common Redshank 1630 1732 individuals 100 favourable
Tringa totanus Common Redshank 1720 2262 individuals 100 favourable
Sternula albifrons Little Tern 26 16 breeding pairs 62 unfavourable
Thalasseus sandvicensis Sandwich Tern 340 300 breeding pairs 89 near favourable
Species group - waterbirds A4iii 36093 30054 individuals 84 near favourable
Species group - waterbirds A4iii 21902 18312 individuals 84 near 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 Not assessed low
For more information about IBA monitoring please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
South Walney and Piel Channel Flats Site of Special Scientific Interest (UK) 2,331 protected area is adjacent to site 0
Sandscale Haws National Nature Reserve 262 protected area contained by site 0
Sandscale Haws Nature Reserve 262 protected area contained by site 0
North Walney National Nature Reserve 647 protected area overlaps with site 0
Morecambe Bay and Duddon Estuary Special Protection Area (Birds Directive) 66,899 protected area contains site 0
Morecambe Bay Marine Protected Area (OSPAR) 0 protected area is adjacent to site 0
Morecambe Bay Ramsar Site, Wetland of International Importance 37,405 protected area is adjacent to site 0
Morecambe Bay Site of Community Importance (Habitats Directive) 61,538 protected area contains site 0
Morecambe Bay Marine Protected Area (OSPAR) 0 protected area overlaps with site 0
Millom Iron Works Local Nature Reserve 21 protected area overlaps with site 0
Lake District National Park 236,386 protected area is adjacent to site 0
Hodbarrow Nature Reserve 106 protected area contained by site 0
Duddon Mosses Site of Special Scientific Interest (UK) 355 protected area is adjacent to site 0
Duddon Estuary Ramsar Site, Wetland of International Importance 6,806 protected area overlaps with site 6,756
Duddon Estuary Site of Special Scientific Interest (UK) 6,790 protected area overlaps with site 6,756
Duddon Estuary Marine Protected Area (OSPAR) 0 protected area overlaps with site 0
Duddon Estuary Special Protection Area (Birds Directive) 6,314 is identical to site 6,756

Habitats

IUCN Habitat Habitat detail Extent (% of site)
Forest Broadleaved deciduous woodland -
Shrubland Scrub -
Grassland -
Wetlands (inland) Mud flats and sand flats, Salt marshes, Sand dunes and beaches, Shingle or stony beaches, Standing freshwater, Rivers and streams -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
tourism/recreation -
For further information about the land use classification please click here.


Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Duddon Estuary. Downloaded from http://www.birdlife.org on 13/08/2022.