Arger Fen is an ancient wood in the parish of Wormingford, Suffolk. It sits alongside a fen meadow. The wood contains Oak, Ash, Field Maple, Holly, Crab Apple, Large Alder, Hazel and Wild Cherry. It is home to the rare Hazel Dormouse and Barbastelle bats and Common Lizards and Grass Snakes. It is open to the public.