Year of compilation: 2007

Site description
A low-lying, flat-topped basalt island situated about 18 km west of the mainland Dyfed coast. Vegetation is limited by exposure to wind, salt spray and the large numbers of seabirds. The site is important for its seabird colonies, including a very large gannetry.

Key biodiversity

Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Grassholm. Downloaded from on 23/03/2023.