Little Hallingbury Marsh

Little Hallingbury Marsh is a 4.5 hectare biological Site of Special Scientific Interest adjacent to the River Stort, west of Little Hallingbury in Essex. It was notified under Section 28 of the Wildlife and Countryside Act 1981, and the local planning authority is Uttlesford District Council.

The site is unimproved wet grassland and fen, which contains uncommon and declining swamp plant species. The wettest part is dominated by Reed Sweet-grass, and the ditches by branched reed-bur. The site is also of interest for over-wintering birds and aquatic insects, especially dragonflies.

The site is private land with no public access, but it can be viewed from the River Stort towpath.