Appropriately, Ystwyth means supple in English, because with its shifting currents braiding silvery sands, its course changes often and it is never quite the same as when you last saw it. In spate its levels fluctuate dramatically. Plants like alpine pennycress take root and then vanish. From its boggy source in the Cambrian Mountains to Aberyswtwyth where it slips quietly into the Rheidol, Afon Ystwyth is a secretive stream.

Read more in BBC Countryfile Magazine, Special Issue, Autumn 2017

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Photos by the lovely Giles W Bennett http://www.gileswbennett.org.uk/

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