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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 at site	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: The current IUCN Red List category may differ from the category that was valid at the time of IBA criteria assessment.

For more information about the IBA criteria, please click here

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 the site (state), by species
Scientific name	Common name	Reference population	Actual population	Units	% of population 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	3580	212	individuals	6	very unfavourable
Calidris canutus	Red Knot	5300	1235	individuals	24	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	21902	18312	individuals	84	near favourable
Species group - waterbirds	A4iii	36093	30054	individuals	84	near favourable

Conservation actions taken at the site (response)
Protected-area designation	Management planning	Other 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 conservation status, please click here

Protected area (PA)	PA designation	PA area (ha)	Relationship of PA with IBA	Overlap of PA 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	Site of Community Importance (Habitats Directive)	61,538	protected area contains site	0
Morecambe Bay	Ramsar Site, Wetland of International Importance	37,405	protected area is adjacent to 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

IUCN Habitat	Habitat detail	Extent (% of site)
Forest	Broadleaved deciduous woodland	-
Shrubland	Scrub	-
Grassland		-
Marine Intertidal		-
Marine Coastal/Supratidal		-
Marine Neritic		-

For further information about the IUCN habitat classification, please click here.

Land-use	Extent (% of site)
tourism/recreation	-

For further information about the land-use classification, please click here.

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Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Duddon Estuary. Downloaded from http://datazone.birdlife.org/site/factsheet/2458 on 30/05/2023.