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Location Spain, Cantabria
Central coordinates 3o 30.00' West  43o 30.00' North
IBA criteria B1i, B2, C2, C3
Area 6,907 ha
Altitude 0 - 378m
Year of IBA assessment 2000

SEO/BirdLife



Site description A coastal marsh with sand-dunes and extensive intertidal mudflats. Human activities include fishing and shellfish collecting.

Key Biodiversity The most important wintering and passage site for waterbirds on the north coast of the Iberian peninsula.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Eurasian Wigeon Mareca penelope winter  1995  2,391-5,828 individuals  good  B1i, C3  Least Concern 
Eurasian Spoonbill Platalea leucorodia passage  1995  52-110 individuals  good  B1i, C2  Least Concern 
Eurasian Curlew Numenius arquata winter  1995  426-1,450 individuals  good  B2  Near Threatened 

IBA Monitoring

2007 very high favourable medium
Population
Good - based on reliable and complete / representative data

Agricultural expansion and intensification marine and freshwater aquaculture - industrial aquaculture past (and unlikely to return) and no longer limiting majority/most of area/population (50-90%) moderate to rapid deterioration low
Agricultural expansion and intensification marine and freshwater aquaculture - subsistence/artisinal aquaculture past (and unlikely to return) and no longer limiting majority/most of area/population (50-90%) moderate to rapid deterioration low
Human intrusions and disturbance recreational activities likely in short term (within 4 years) some of area/population (10-49%) no or imperceptible deterioration low
Invasive and other problematic species and genes invasive non-native/alien species/diseases - named species happening now whole area/population (>90%) very rapid to severe deterioration very high
Over-exploitation, persecution and control of species fishing & harvesting aquatic resources - unintentional effects: large scale happening now small area/few individuals (<10%) slow but significant deterioration low
Over-exploitation, persecution and control of species hunting & collecting terrestrial animals - intentional use (species being assessed is the target) past (and unlikely to return) and no longer limiting small area/few individuals (<10%) no or imperceptible deterioration low
Pollution domestic & urban waste water - type unknown/unrecorded happening now whole area/population (>90%) moderate to rapid deterioration very high
Pollution garbage & solid waste happening now whole area/population (>90%) moderate to rapid deterioration very high
Residential and commercial development commercial and industrial development happening now some of area/population (10-49%) moderate to rapid deterioration high
Residential and commercial development tourism and recreation areas likely in short term (within 4 years) majority/most of area/population (50-90%) slow but significant deterioration medium
Transportation and service corridors roads and railroads happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Transportation and service corridors utility & service lines happening now majority/most of area/population (50-90%) moderate to rapid deterioration high

Mareca penelope Eurasian Wigeon 5828 5333 individuals 92 favourable
Platalea leucorodia Eurasian Spoonbill 52 57 individuals 100 favourable
Numenius arquata Eurasian Curlew 426 416 individuals 98 favourable

Whole area of site (>90%) covered by appropriate conservation designation  A management plan exists but it is out of date or not comprehensive  Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity  medium 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Costa central y R Habitats Directive 444 protected area overlaps with site 119  
Marismas de Santoña Wetlands of International Importance (Ramsar) 6,907 protected area contained by site 6,907  
Marismas de Santoña , Victoria y Joyel - ES1300007 Habitats Directive 3,701 protected area contained by site 3,701  
Marismas de Santoña y Noja Natural Reserve 3,866 protected area contained by site 3,866  
Marismas de Santoña y Noja - ES0000143 Birds Directive 6,604 protected area contained by site 6,604  
Rio Ason - ES1300011 Habitats Directive 530 protected area is adjacent to site 0  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Standing brackish and salt water  -
Artificial - terrestrial Highly improved re-seeded landscapes; Other urban and industrial areas  50%
Coastline Mud flats & sand flats; Tidal rivers & enclosed tidal waters  -

Land use

Land-use Extent (% of site)
agriculture 60%
fisheries/aquaculture 10%
urban/industrial/transport -
forestry 40%

Protection status National Partial International High3,866 ha of IBA covered by Natural Reserve (Marismas de Santoña y Noja, 3,866 ha). 6,907 ha of IBA covered by Ramsar Site (Marismas de Santoña, 6,907 ha). 6,907 ha of IBA covered by Special Protection Area (Marismas de Santoña, 6,907 ha).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Santoña marshes. Downloaded from http://www.birdlife.org on 19/12/2014

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