A bay with saltwater marshes and mudflats, ponds, wet meadows with ditches, woodland, grassland, and arable land.
One of the most important wintering sites for waterbirds in France. The site holds 20,000 or more waterbirds on passage and in winter, on a regular basis.
BirdLife International (2019) Important Bird Areas factsheet: Ile d'Oléron, marais de Brouage-Saint-Agnant. Downloaded from http://www.birdlife.org on 22/04/2019.