Crymlyn Bog

Ramsar logo

Crymlyn Bog

  • Country: 
    United Kingdom of Great Britain and Northern Ireland
  • Site number: 
  • Area: 
    268 ha
  • Designation date: 
  • Coordinates: 
    51°38'N 03°53'W
Materials presented on this website, particularly maps and territorial information, are as-is and as-available based on available data and do not imply the expression of any opinion whatsoever on the part of the Secretariat of the Ramsar Convention concerning the legal status of any country, territory, city or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries.


Crymlyn Bog. 08/06/93; Wales; 268 ha; 51°38'N 003°53'W. Nature Reserve, SSSI. One of the largest valley floodplain mires in Wales, and amongst the most important in the United Kingdom, the site forms part of an extensive inter-estuarine complex. The site includes the adjacent Pant-y-Sais Fen and consists of a complex mosaic of vegetation types made up of communities characteristic of both nutrient-rich and nutrient-poor conditions. Notable plant communities include the semi-floating fen and the nationally rare cotton-grass Eriophorum gracile community. The area is notable for its rich invertebrate fauna, including many nationally rare or highly localized species associated with mires. Ramsar site no. 608. Most recent RIS information: 2005.

Administrative region: 

  • National legal designation: 
    • nnr
    • sssi
  • Regional (international) legal designations: 
    • EU Natura 2000
  • Last publication date: 


Ramsar Information Sheet (RIS)