Mildenhall Fen is a nature reserve located in Suffolk, England. It is known for its rich biodiversity, including various species of birds, plants, and insects. The fen is characterized by its wetland habitats, which provide essential ecosystems for wildlife. The area is part of the larger Suffolk Wildlife Trust network and is managed to promote conservation and public enjoyment. Visitors can explore walking trails and observe the unique flora and fauna, making it a popular spot for nature enthusiasts and birdwatchers alike.