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Location Spain, Asturias,Galicia
Central coordinates 7o 4.00' West  43o 33.00' North
IBA criteria A4i, B1i, B2, C3, C6
Area 7,500 ha
Altitude 0 - 50m
Year of IBA assessment 2000


Site description This site includes intertidal mudflats and sandbanks, saltmarsh, cliffs, beaches and a marine section.

Key Biodiversity This is an important area for wintering and passage wildfowl and waders and breeding seabirds. It is also one of the most important sites for waterbirds on the Cantabric coast.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Northern Pintail Anas acuta winter  1996  250-770 individuals  medium  B1i, C3  Least Concern 
Baillon's Crake Zapornia pusilla resident  1996  30 breeding pairs  medium  B2, C6  Least Concern 
Larus cachinnans resident  1996  1,500 breeding pairs  good  A4i, B1i, C3  Not Recognised 
Larus cachinnans winter  1996  5,400 individuals  good  A4i, B1i, C3  Not Recognised 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Ria del Eo National Game Reserve 2,000 protected area overlaps with site 1,800  
Ría del Eo Wetlands of International Importance (Ramsar) 1,740 protected area contained by site 1,740  


IUCN habitat Habitat detail Extent (% of site)
Coastline Mud flats & sand flats; Tidal rivers & enclosed tidal waters  -
Wetlands (inland) Rivers and streams; Water fringe vegetation  -
Sea Open Sea; Sea inlets and coastal features  26%
Artificial - terrestrial Arable land; Forestry plantations; Highly improved re-seeded landscapes; Other urban and industrial areas  -

Land use

Land-use Extent (% of site)
agriculture -
fisheries/aquaculture 26%
forestry -
urban/industrial/transport -

Protection status National Partial International Partial1,800 ha of IBA covered by National Game Reserve (Ría del Eo, 2,023 ha). 1,740 ha of IBA covered by Ramsar Site (Ría del Eo, 1,740 ha). 1,740 ha of IBA covered by Special Protection Area (Ría del Eo, 1,740 ha).

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Recommended citation  BirdLife International (2015) Important Bird Areas factsheet: Eo river estuary-Barayo beach-Ría de Foz. Downloaded from on 07/10/2015

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