to which a common EU-wide legislation applies. Certain habitats among those are furthermore designated as "priority habitat types". Habitats in the EU are given codes. An area or habitat can combine two habitats, and be designated as for example code 35.2 × 64.1 - Open grassland with Corynephorus and Agrostis (35.2), in combination with continental dunes (64.1). Example Annex I habitats are:

Open sea and tidal areas
*Sea cliffs and shingle or stony beaches
*Atlantic