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The site was identified as internationally important for bird conservation in 2000 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Northern Shoveler Spatula clypeata	LC	winter (1997)	1,800–4,000 birds	B1i, C3
Northern Shoveler Spatula clypeata	LC	passage (1997)	3,000–5,000 birds	A4i, B1i, C3
Gadwall Mareca strepera	LC	breeding (1997)	40–50 pairs	B2
Northern Pintail Anas acuta	LC	passage (1997)	1,000–1,200 birds	B1i, C3
Eurasian Coot Fulica atra	LC	passage (1997)	20,000 birds	B1i, C3
Eurasian Spoonbill Platalea leucorodia	LC	breeding (1991)	10–15 pairs	B1i, B2, C2, C6
Common Little Bittern Ixobrychus minutus	LC	breeding (1991)	1–10 pairs	C6
Black-crowned Night Heron Nycticorax nycticorax	LC	breeding (1994)	55 pairs	C6
Purple Heron Ardea purpurea	LC	breeding (1991)	40–80 pairs	C2, C6
Little Egret Egretta garzetta	LC	breeding (1991)	180 pairs	C6
Western Marsh-harrier Circus aeruginosus	LC	breeding (1997)	20–40 pairs	C6
Black Kite Milvus migrans	LC	breeding (1991)	15–25 pairs	C6
A4iii Species group - waterbirds	n/a	passage (1997)	20,000-49,999 birds	A4iii, C4

Year	Protected Area	Designation (management category)	% coverage of IBA
1980	Lac de Grand-Lieu	Réserve naturelle nationale (IV)	48
2005	PRES DE SAINT-LUMINE ET DE SAINT-MARS	Terrain acquis par le Conservatoire du Littoral (IV)	<1
2005	RIVES NORD DU LAC DE GRAND LIEU	Terrain acquis par le Conservatoire du Littoral (IV)	<1
2007	LAC DE GRAND LIEU	Terrain acquis par le Conservatoire du Littoral (IV)	49
2008	Lac de Grand-Lieu	Réserve naturelle régionale (IV)	11

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

Land use	% of IBA
fisheries/aquaculture	100
hunting	94
agriculture	48
forestry	2
urban/industrial/transport	1

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Lac de Grand-Lieu (France). Downloaded from https://datazone.birdlife.org/site/factsheet/lac-de-grand-lieu-iba-france on 22/12/2024.