Cothill Fen National Nature Reserve - Saturday, 3rd October 2026
Blog by Sally. Photos by Margaret, Michele and Sally On a fine, but cloudy autumnal morning, thirteen Green Gymmers met Steph from Natural England in Cothill School car park. We donned wellington boots and transferred the tools from Adrian's car to Steph's trailer and we made our way along String Lane to Cothill Fen NNR. This is a calcareous or alkaline fen, where the spring-fed water percolates through a layer of chalk, thereby reducing the acidity. These are extremely rare habitats and we are blessed to have a number in Oxfordshire. The Natural England monthly volunteer party had worked on the Fen the previous day, so Adrian, our leader for the session, explained that there was some raking for us to do and some scything of reed to finish off. We were also tasked with digging up holly seedlings from the wood, as if they were allowed to grow, they would block out light from the understorey, which would mean fewer bluebells. Another task wa...