Gors Maen Llwyd, a heather moorland, is home to a range of upland birds with areas of peat bog, which are rich in plant and insect life.
It is the largest of the Trust's reserves at 280 hectares. Purchased in 1988, this heather moorland and blanket bog habitat is part of the Mynydd Hiraethog SSSI.
http://www.northwaleswildlifetrust.org.uk/pdfs/GorsMaenLlwyd_web.pdf