email a friend
printable version
Location France, Poitou-Charentes
Central coordinates 1o 27.00' West  46o 13.00' North
IBA criteria A4i, A4iii, B1i, B2, C2, C3, C4, C6
Area 309,258 ha
Altitude 0 - 2m
Year of IBA assessment 2000

Ligue Pour La Protection des Oiseaux

Site description A bay with saltwater lagoons, saltwater marshes and mudflats.

Key Biodiversity The site holds 20,000 or more waterbirds in winter, on a regular basis. The site is also important for breeding waders.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Brent Goose Branta bernicla winter  1997  8,500-13,420 individuals  A4i, B1i, C3  Least Concern 
Horned Grebe Podiceps auritus winter  1997  42-119 individuals  B1i, C2  Vulnerable 
Egretta garzetta winter  1997  233-830 individuals  B1i, C2  Not Recognised 
Egretta garzetta breeding  1997  220 breeding pairs  C6  Not Recognised 
Western Marsh-harrier Circus aeruginosus breeding  1991  15-20 breeding pairs  C6  Least Concern 
Himantopus himantopus breeding  1997  5-20 breeding pairs  C6  Not Recognised 
Pied Avocet Recurvirostra avosetta winter  1997  420-1,835 individuals  A4i, B1i, B2, C2  Least Concern 
Pied Avocet Recurvirostra avosetta breeding  1997  31-69 breeding pairs  C6  Least Concern 
Grey Plover Pluvialis squatarola winter  1997  930-2,300 individuals  A4i, B1i, C3  Least Concern 
Ruddy Turnstone Arenaria interpres winter  1997  292-730 individuals  A4i, B1i, C3  Least Concern 
Dunlin Calidris alpina winter  1997  12,330-17,050 individuals  B1i, B2, C3  Least Concern 
A4iii Species group - waterbirds winter  1997  20,000-49,999 individuals  unknown  A4iii, C4   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Ile de Re Hunting Reserve 1,300 protected area contained by site 1,300  
Lilleau des Niges National Nature Reserve 150 protected area contained by site 195  
Marais du Fier d'Ars Wetlands of International Importance (Ramsar) 4,452 protected area overlaps with site 4,368  


IUCN habitat Habitat detail Extent (% of site)
Coastline Lagoons; Mud flats & sand flats; Salt marshes  -
Sea Sea inlets and coastal features  -

Land use

Land-use Extent (% of site)
fisheries/aquaculture -
hunting -
urban/industrial/transport -

Protection status National Partial International High195 ha of IBA covered by Nature Reserve (Lilleau des Niges, 195 ha). 1,300 ha of IBA covered by Hunting Reserve (Il de Ré, 1,300 ha). 4,350 ha of IBA covered by Special Protection Area (Anse du Fiers d'Ars en Ré, 5,080 ha).

Contribute  Please click here to help BirdLife conserve the world's birds - your data for this IBA and others are vital for helping protect the environment.

Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Anse du Fiers d'Ars en Ré. Downloaded from on 25/10/2016

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