Grassholm (Welsh: Gwales or Ynys Gwales) or Grassholm Island[2] is a small uninhabited island situated 13 kilometres (8 mi) off the southwestern Pembrokeshire coast in Wales, lying west of Skomer, in the community of Marloes and St Brides.[3] It is the westernmost point in Wales other than the isolated rocks on which the Smalls Lighthouse stands. Grassholm is known for its huge colony of northern gannets; the island has been owned since 1947 by the Royal Society for the Protection of Birds, and is one of its oldest reserves. It reaches 42 metres (138 ft).
Grassholm National Nature Reserve is the third most important site for gannets in the world, after two sites in Scotland: St Kilda and Bass Rock. It serves as a breeding site for 39,000 pairs of the birds, and supports around 10 per cent of the world population.[4][5] The turbulent sea around Grassholm is a good feeding area for porpoises and bottlenose dolphins.
The island has a significant problem with marine plastic, brought to the island by breeding gannets, as nesting material which the birds have mistaken for seaweed floating in the surrounding waters. The problem has been ongoing through twelve years of RSPB conservation to 2017, and surveys have indicated that 80% of nests contain waste plastics.[6][7][8]
Boats sail to Grassholm from St Davids Lifeboat Station and Martin's Haven on the mainland, but members of the public are not permitted to land.[5]
Geologically, the island is largely formed from keratophyre, though the northwest coast and the islet of West Tump are formed from basalt. A couple of NE-SW aligned faults cross the island. Raised beaches are present in places.[9]
Grassholm (Welsh: Gwales or Ynys Gwales) or Grassholm Island is a small uninhabited island situated 13 kilometres (8 mi) off the southwestern Pembrokeshire...
Marloes Peninsula in Pembrokeshire, Wales, and 8 miles (13 km) west of Grassholm. It was erected in 1861 by engineer James Douglass to replace a previous...
Mouse Bardsey Island Caldey Island Cardigan Island Denny Island Flat Holm Grassholm Island Ramsey Island Skokholm Island Skomer Island Sully Island Anguilla...
75,000 pairs. Sulasgeir off the coast of the Isle of Lewis, St. Kilda, Grassholm in Pembrokeshire, Bempton Cliffs in the East Riding of Yorkshire, Sceilig...
islands off the Pembrokeshire coast, the largest of which are Ramsey, Grassholm, Skokholm, Skomer and Caldey. The seas around Skomer and Skokholm, and...
pairs as of 2013) and Ailsa Craig (33,000 pairs as of 2014) in Scotland, Grassholm in Wales, and Bonaventure Island (60,000 pairs in 2009) off the coast...
Clerks Caldey Island Cemaes Head Crow Rock Dinas Island Emsger Gateholm Grassholm Middleholm Ramsey Island St Catherine's Island Strumble Head Skokholm...
to happen by walking incautiously across nesting slopes. A colony on Grassholm was lost through erosion when so little soil was left that burrows could...
for Caldey Island (Welsh: Ynys Bŷr), Flat Holm (Welsh: Ynys Echni) and Grassholm (Welsh: Ynys Gwales) are also those of the Viking raiders. Wales' second...
continues to speak. They later move on to Gwales (often identified with Grassholm Island off Dyfed) where they live for eighty years without perceiving...
Clerks Caldey Island Cemaes Head Crow Rock Dinas Island Emsger Gateholm Grassholm Middleholm Ramsey Island St Catherine's Island Strumble Head Skokholm...
In 1983 he won the Welsh Arts Council prize for his volume of poetry, "Grassholm", and in 1986 he was the Chaired Bard at the National Eisteddfod in Fishguard...
Clerks Caldey Island Cemaes Head Crow Rock Dinas Island Emsger Gateholm Grassholm Middleholm Ramsey Island St Catherine's Island Strumble Head Skokholm...
Clerks Caldey Island Cemaes Head Crow Rock Dinas Island Emsger Gateholm Grassholm Middleholm Ramsey Island St Catherine's Island Strumble Head Skokholm...
Clerks Caldey Island Cemaes Head Crow Rock Dinas Island Emsger Gateholm Grassholm Middleholm Ramsey Island St Catherine's Island Strumble Head Skokholm...
Retrieved 13 January 2020. "Bug Bioblitz – Ramsey Island and Grassholm – Ramsey Island and Grassholm – The RSPB Community". community.rspb.org.uk. 27 June 2012...
colony of Northern Gannets (Morus bassanus) on the small rocky island of Grassholm, off the coast of Wales. It received a special mention at the 3rd Venice...
Clerks Caldey Island Cemaes Head Crow Rock Dinas Island Emsger Gateholm Grassholm Middleholm Ramsey Island St Catherine's Island Strumble Head Skokholm...
Gannets. For the film, shot with the support of the Royal Navy around Grassholm off the Pembrokeshire coast, they won an Oscar for best documentary. Huxley...
Clerks Caldey Island Cemaes Head Crow Rock Dinas Island Emsger Gateholm Grassholm Middleholm Ramsey Island St Catherine's Island Strumble Head Skokholm...
continues to speak. They later move on to Gwales (often identified with Grassholm off Dyfed) where they live for eighty years without perceiving the passing...
numbers of seabirds (particularly on offshore islands such as Skomer, Grassholm and Bardsey) and good populations of several species typical of Welsh...
Clerks Caldey Island Cemaes Head Crow Rock Dinas Island Emsger Gateholm Grassholm Middleholm Ramsey Island St Catherine's Island Strumble Head Skokholm...
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