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Location France, Pays de la Loire
Central coordinates 1o 40.00' West  47o 5.00' North
IBA criteria A4i, A4iii, B1i, B2, C2, C3, C4, C6
Area 5,600 ha
Altitude 2 - 5m
Year of IBA assessment 2000

Ligue Pour La Protection des Oiseaux

Site description A lake, with associated reedbeds (Phragmites) and wet meadows, and woodlands, hedgerows and cultivated land.

Key Biodiversity The site holds 20,000 or more waterbirds on passage and in winter, on a regular basis. Species of global conservation concern that do not meet IBA criteria: Aythya nyroca (wintering); Crex crex (passage).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Northern Pintail Anas acuta passage  1997  1,000-1,200 individuals  B1i, C3  Least Concern 
Gadwall Mareca strepera breeding  1997  40-50 breeding pairs  B2  Least Concern 
Northern Shoveler Spatula clypeata winter  1997  1,800-4,000 individuals  B1i, C3  Least Concern 
Northern Shoveler Spatula clypeata passage  1997  3,000-5,000 individuals  A4i, B1i, C3  Least Concern 
Eurasian Spoonbill Platalea leucorodia breeding  1991  10-15 breeding pairs  B1i, B2, C2, C6  Least Concern 
Ixobrychus minutus breeding  1991  1-10 breeding pairs  C6  Not Recognised 
Black-crowned Night-heron Nycticorax nycticorax breeding  1994  55 breeding pairs  C6  Least Concern 
Purple Heron Ardea purpurea breeding  1991  40-80 breeding pairs  C2, C6  Least Concern 
Egretta garzetta breeding  1991  180 breeding pairs  C6  Not Recognised 
Western Marsh-harrier Circus aeruginosus breeding  1997  20-40 breeding pairs  C6  Least Concern 
Milvus migrans breeding  1991  15-25 breeding pairs  C6  Not Recognised 
Common Coot Fulica atra passage  1997  20,000 individuals  B1i, C3  Least Concern 
A4iii Species group - waterbirds passage  1997  20,000-49,999 individuals  unknown  A4iii, C4   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Lac de Grand-Lieu National Nature Reserve 2,695 protected area contained by site 2,694  
Lac de Grand-Lieu Wetlands of International Importance (Ramsar) 6,300 protected area overlaps with site 5,600  


IUCN habitat Habitat detail Extent (% of site)
Forest Broadleaved deciduous woodland  -
Shrubland Heathland  -
Grassland Humid grasslands  29%
Wetlands (inland) Rivers and streams; Standing freshwater; Water fringe vegetation  58%
Artificial - terrestrial Arable land; Perennial crops, orchards and groves  18%

Land use

Land-use Extent (% of site)
agriculture 48%
fisheries/aquaculture 100%
forestry 2%
hunting 94%
urban/industrial/transport 1%

Protection status National Partial International High2,694 ha of IBA covered by Nature Reserve (Lac de Grand-Lieu, 2,694 ha). 5,600 ha of IBA covered by Special Protection Area (Lac de Grand-Lieu, 6,000 ha). 5,600 ha of IBA covered by Ramsar Site (Grand-Lieu, 6,300 ha).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Lac de Grand-Lieu. Downloaded from on 26/10/2016

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