Habitats include tall wash grassland, which is now rare, marsh and waterlogged grassland. It has a wide variety of plant species, including reed sweet-grass and meadowsweet. There are flowers such as fen bedstraw and early marsh orchid. Breeding birds include snipe and water rails.[3] The site also has the endangered Desmoulin's whorl snail, which is in the Red Date Book, together with diverse dragonflies, damselflies, birds, bats, small mammals and reptiles.[5]
There are five wooden sculptures by Daniel Cordell, commissioned by the Wildlife Trust in 2012.[2]
The Stort Navigation forms the boundary between Hertfordshire and Essex, and the site is on the Hertfordshire bank, but access is by a bridge from the towpath on the eastern Essex side. Access is restricted to footpaths due to the dangerous deep silt on the site.