A lake, with associated reedbeds (Phragmites) and wet meadows, and woodlands, hedgerows and cultivated land.
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).
Pressure/threats to key biodiversity
The site is drying out as it no longer receives sufficient water from the River Loire (`Other' threats, above). Problems of eutrophication are common due to agricultural pollution.
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).
BirdLife International (2020) Important Bird Areas factsheet: Lac de Grand-Lieu. Downloaded from
http://www.birdlife.org on 16/07/2020.