Country/territory: United Kingdom

IBA Criteria met: A4ii, A4iii, B1ii, B2, C3, C4 (2007)
For more information about IBA criteria please click here

Area: 11 ha

Royal Society for the Protection of Birds
Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2007 high favourable high
For more information about IBA monitoring please click here

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.

Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Grassholm. Downloaded from on 25/03/2023.