Nene Washes is a 1,522-hectare (3,760-acre) biological Site of Special Scientific Interest on the bank of the River Nene east of Peterborough in Cambridgeshire. It is also a Ramsar internationally important wetland site, a Special Area of Conservation, a Special Protection Area and a Nature Conservation Review site. An area of 280 hectares is managed by the Royal Society for the Protection of Birds. The total area of the Ramsar site is 1,517 hectares.
Holme Fen is a 269.4-hectare (666-acre) biological Site of Special Scientific Interest near Holme in Cambridgeshire. It is also a National Nature Reserve and a Nature Conservation Review site, Grade I. It is part of the Great Fen project, which aims to create a 3,700 wetland wildlife area including Holme Fen, Woodwalton Fen and other areas. It is home to a variety of birds, including the Eurasian siskin, Nightingale and Lesser redpoll, and around 450 species of fungi.
Fulbourn Fen is a 27.3-hectare (67-acre) biological Site of Special Scientific Interest east of Fulbourn, Cambridgeshire. It is privately owned and managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Soham Wet Horse Fen is a 33.8-hectare (84-acre) biological Site of Special Scientific Interest east of Soham in Cambridgeshire. A 3.6-hectare (8.9-acre) field in the north-west corner is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire as Soham Meadow.
Woodwalton Fen is a 209 hectare biological Site of Special Scientific Interest in the parish of Woodwalton, west of Ramsey in Huntingdonshire, Cambridgeshire, England. It is a Ramsar wetland site of international importance, a National Nature Reserve, a Special Area of Conservation and a Nature Conservation Review site, Grade I. The site is managed by Natural England.
Cornard Mere is an 8.5-hectare (21-acre) biological Site of Special Scientific Interest in Little Cornard in Suffolk. It is managed by the Suffolk Wildlife Trust.
The Crouch and Roach Estuaries are a 1729 hectare biological Site of Special Scientific Interest (SSSI) at the mouth of the Crouch and Roach rivers in Essex. The Crouch part of the SSSI stretches from near Battlesbridge to Foulness Island, and the Roach from Rochford to the junction with the Crouch. Part of the site is in the Mid-Essex Coast Special Protection Area under the EC Directive on the Conservation of Wild Birds, and a Ramsar wetland site of international importance. It is also part of the Essex Estuaries Special Area of Conservation. An area of 65 hectares is managed by the Essex Wildlife Trust as the Lion Creek and Lower Raypits nature reserve and 8 hectares at Woodham Fen, both of which are managed by the Essex Wildlife Trust. A small area is also a geological SSSI, The Cliff, Burnham-on-Crouch.
Debden Water SSSI is a 20.9-hectare (52-acre) biological Site of Special Scientific Interest which comprises two stretches of Debden Water, a small tributary of the River Cam, and surrounding land. The site is on the eastern outskirts of Newport in Essex, where the stream joins the Cam.
Dernford Fen is a 10.3-hectare (25-acre) biological Site of Special Scientific Interest north-west of Sawston in Cambridgeshire.
L-Moor, Shepreth is a 6.6-hectare (16-acre) biological Site of Special Scientific Interest in Shepreth in Cambridgeshire. It is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Upware North Pit is a 1.1-hectare (2.7-acre) biological Site of Special Scientific Interest north-west of Wicken in Cambridgeshire.
Cam Washes is a 166.5-hectare (411-acre) biological Site of Special Scientific Interest west of Wicken in Cambridgeshire.
Chippenham Fen and Snailwell Poor's Fen is a 155.9-hectare (385-acre) biological Site of Special Scientific Interest south-east of Fordham in Cambridgeshire, England. It is a Nature Conservation Review site, Grade I, a Ramsar wetland site and a Special Area of Conservation. It is managed by Natural England.
Little Paxton Pits is a 127.4-hectare (315-acre) biological Site of Special Scientific Interest in Little Paxton in Cambridgeshire. Part of it is also a 60 hectare Local Nature Reserve (LNR).
Stow-Cum-Quy Fen is a 29.9-hectare (74-acre) biological Site of Special Scientific Interest west of Lode in Cambridgeshire. Most of it is common land.
River Ise and Meadows is a 13.5 hectare biological Site of Special Scientific Interest along the River Ise in Northamptonshire between Geddington and the Kettering to Corby railway line east of Rushton.
Pakefield to Easton Bavents is a 735.4-hectare (1,817-acre) biological and geological Site of Special Scientific Interest which stretches along the Suffolk coast between Lowestoft and Southwold. It includes three Geological Conservation Review sites, and part of the Benacre National Nature Reserve. An area of 326.7 hectares is the Benacre to Easton Bavents Lagoons Special Area of Conservation, and 470.6 hectares is the Benacre to Easton Bavents Special Protection Area under the European Union Directive on the Conservation of Wild Birds. The site is also partly in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Stallode Wash, Lakenheath is a 34.1-hectare (84-acre) biological Site of Special Scientific Interest north-west of Lakenheath in Suffolk.
Poplar Farm Meadows, Langley is a 7.5-hectare (19-acre) biological Site of Special Scientific Interest east of Loddon in Norfolk. It is part of the Broadland Ramsar site and Special Protection Area, and The Broads Special Area of Conservation.
