A largely marine area with sand and shingle beaches, cliffs, heathlands, meadows and arable fields.
The site holds 20,000 or more waterbirds on passage, on a regular basis. Species of global conservation concern that do not meet criteria: Aythya nyroca (passage and wintering).
BirdLife International (2019) Important Bird Areas factsheet: Cap Gris-nez. Downloaded from http://www.birdlife.org on 19/10/2019.