Cors Bodeilio National Nature Reserve lies in a shallow valley outside
Talwrn
Talwrn is a small village between the county town of Llangefni and Pentraeth on the Isle of Anglesey, north Wales. Talwrn is most notable for the Grade II-listed 16th-century manor house of Plas Llanddyfnan, which lies just to the north of the ham ...
on the
Isle of Anglesey
Anglesey (; cy, (Ynys) Môn ) is an island off the north-west coast of Wales. It forms a principal area known as the Isle of Anglesey, that includes Holy Island across the narrow Cymyran Strait and some islets and skerries. Anglesey island, ...
. Most of the land consists of a lime-rich
mire
A mire, peatland, or quagmire is a wetland area dominated by living peat-forming plants. Mires arise because of incomplete decomposition of organic matter, usually litter from vegetation, due to water-logging and subsequent anoxia. All types ...
. This type of
wetland
A wetland is a distinct ecosystem that is flooded or saturated by water, either permanently (for years or decades) or seasonally (for weeks or months). Flooding results in oxygen-free (anoxic) processes prevailing, especially in the soils. The ...
is rare, giving the reserve national importance. It is host to a large range of plants and animals, including the medicinal
leech
Leeches are segmented parasitic or predatory worms that comprise the subclass Hirudinea within the phylum Annelida. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular segmented bodie ...
.
A number of nationally local or rare species of plant have been recorded from the site including fen pondweed, several species of stonewort including the rare dwarf stonewort, olive earthtongue fungus (''Microglossum olivaceum''), fen pondweed, narrow-leaved marsh orchid and fly orchid
The nature reserve is within a designated
Site of Special Scientific Interest
A Site of Special Scientific Interest (SSSI) in Great Britain or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland is a conservation designation denoting a protected area in the United Kingdom and Isle of ...
Ramsar site
A Ramsar site is a wetland site designated to be of international importance under the Ramsar Convention,8 ha (O)
*** Permanent 8 ha (P)
*** Seasonal Intermittent < 8 ha(Ts)
**