The site includes ponds, moorlands, Quercus forests, marshes and aquatic vegetation, cereal fields and bocages.
The site is regionally important for breeding and wintering waterbirds. Species of global conservation concern that do not meet IBA criteria: Aythya nyroca (passage); Haliaeetus albicilla (wintering).
BirdLife International (2020) Important Bird Areas factsheet: Region de Pressac, étang de Combourg. Downloaded from http://www.birdlife.org on 27/11/2020.