Anglesey Fens / Corsydd Môn IPA

Location: East Anglesey, between Benllech and Llangefni, to the west of the A5025.

Grid Reference: SH 500 800


Anglesey Fens IPA has been recognised as one of 165 Important Plant Areas in the UK.

The key features of this IPA are:

  • The species richness of stoneworts in base-rich fens
  • One of the best UK examples of threatened habitats of:
    Alkaline fens;
    Calcareous fens with Great Fen Sedge;
    Nutrient-poor waters with Stonewort algae
  • The rich fen system on Anglesey is a rare type of wetland, fed by calcareous springs, that was once much more extensive than it is today.

    The large area of fen is characterised by reeds, sedges and rushes, among which orchids and insectivorous plants may be found.

    The best Welsh sites for stoneworts are here and there are also areas of acid wet heath which support populations of brilliant blue marsh gentians in late summer.

    Anglesey Fens ©David Woodfall/Plantlife