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close| Location | France, Pays de la Loire |
| Central coordinates | 2o 10.00' West 47o 22.00' North |
| IBA criteria | B1i, B2, B3, C2, C3, C6 |
| Area | 18,900 ha |
| Altitude | 0 - 10m |
| Year of IBA assessment | 2000 |
Ornithological information This is an important site for breeding and wintering waterbirds. It is also the best site for Chlidonias niger in France. Species of global conservation concern that do not meet IBA criteria: Haliaeetus albicilla (passage); Aquila clanga (passage); Crex crex (passage); Gallinago media (passage); Acrocephalus paludicola (passage).
Site description Marshes and wet meadows, reedbeds (Phragmites), ponds and arable fields.
Populations of IBA trigger species
| Species | Season | Period | Population estimate | Quality of estimate | IBA Criteria | IUCN Category |
|---|---|---|---|---|---|---|
| Northern Shoveler Anas clypeata | winter | 1997 | 106-401 individuals | - | B1i, C3 | Least Concern |
| Northern Pintail Anas acuta | passage | 1997 | 100-2,500 individuals | - | B1i, C3 | Least Concern |
| Eurasian Spoonbill Platalea leucorodia | passage | 1991 | 40-50 individuals | - | B1i, C2 | Least Concern |
| Great Bittern Botaurus stellaris | breeding | 1997 | 25-45 breeding pairs | - | B2, C2, C6 | Least Concern |
| Black Kite Milvus migrans | breeding | 1991 | 30-40 breeding pairs | - | C6 | Least Concern |
| Western Marsh-harrier Circus aeruginosus | breeding | 1997 | 35-45 breeding pairs | - | C6 | Least Concern |
| Northern Harrier Circus cyaneus | breeding | 1991 | 5-10 breeding pairs | - | C6 | Least Concern |
| Spotted Crake Porzana porzana | breeding | 1991 | 5-10 breeding pairs | - | B3, C6 | Least Concern |
| Whiskered Tern Chlidonias hybrida | breeding | 1991 | 70 breeding pairs | - | B2, C6 | Least Concern |
| Black Tern Chlidonias niger | breeding | 1991 | 50-200 breeding pairs | - | C2, C6 | Least Concern |
| Bluethroat Luscinia svecica | breeding | 1991 | 150-200 breeding pairs | - | C6 | Least Concern |
Protected areas
| Protected area | Designation | Area (ha) | Relationship with IBA | Overlap with IBA (ha) | |
|---|---|---|---|---|---|
| FR022 | Hunting Reserve | 1,075 | protected area contained by site | 1,075 | |
| Grande Brière et marais de Donges - FR5200623 | Habitats Directive | 16,842 | protected area overlaps with site | 16,642 | |
| Grande Brière, marais de Donges et du Brivet - FR5212008 | Birds Directive | 19,754 | protected area overlaps with site | 17,349 | |
| Grande Briere | Wetlands of International Importance (Ramsar) | 19,000 | protected area overlaps with site | 18,900 |
|
Habitats
| IUCN habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Grassland | Humid grasslands; Mesophile grasslands | - |
| Wetlands (inland) | Standing brackish and salt water; Water fringe vegetation | - |
Land use
| Land-use | Extent (% of site) |
|---|---|
| agriculture | - |
| fisheries/aquaculture | - |
| hunting | - |
| tourism/recreation | - |
| urban/industrial/transport | - |
Management considerations The Grande Brière is insufficiently flooded during summer (due to changes to the Loire estuary, see site 023) and the resulting high salinity is having a serious effect on the vegetation at the site. There is also considerable hunting pressure. Drainage and infilling of the surrounding areas are also reported threats.
Protection status National Low International High1,075 ha of IBA covered by Hunting Reserve (1,075 ha). 18,900 ha of IBA covered by Ramsar Site (Grande-Brière, 19,000 ha).
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Marais de Brière. Downloaded from http://www.birdlife.org on 24/05/2013
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