The site includes a river, ponds, marshes and aquatic vegetation, meadows, arable fields and abandoned fields.
The site holds 20,000 or more waterbirds in winter, on a regular basis (including Aythya fuligula 2,000; Fulica atra 4,000 and Vanellus vanellus 5,000). Species of global conservation concern that do not meet IBA criteria: Aythya nyroca (wintering).
BirdLife International (2020) Important Bird Areas factsheet: Boucle de Pose et de Muids. Downloaded from http://www.birdlife.org on 26/09/2020.