Cilsanws Nature Reserve is owned by the Merthyr & District
Naturalists Society and is completely open for you to explore and
There are a few ways to access the area, situated on the south
western side of Cilsanws Mountain.
By travelling through the village of Cefn Coed, heading towards
Trefechan, you can access the reserve via Cloth Hall Lane and
Merthyr Tydfil Golf Course Car Park.
Larches and Scots Pine grow along the Western margins of the
reserve, with more unusual rowan or mountain ash trees springing up
on the higher ground. The Rowans attract species such as thrush,
starlings and blackbirds, and swifts, swallows, house-martins,
buzzards and kestrels are commonly present.
If you are lucky, you may catch a glimpse of a rare
peregrine falcon flying by.
Mammals are shy but are present - field mice, bank voles and
common shrews live in the reserve and there are an abundance of
insects and butterflies, so important to the balance of the
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