Aldbury Nowers is a 19.7 hectare biological Site of Special Scientific Interest (SSSI) in the Chiltern Hills, north-east of Tring in Hertfordshire. The site was notified in 1990 under the Wildlife and Countryside Act 1981. It is managed by the Hertfordshire and Middlesex Wildlife Trust. The site, formerly known as "Duchie's Piece," comprises two areas of hillside, linked by The Ridgeway. The calcareous meadow element of the site hosts the flowers of chalk grassland and has butterfly habitats with thirty-four different species of butterfly recently recorded, including the Duke of Burgundy, hairstreaks and the Essex skipper. The site also includes a "beech hanger", a type of upland ancient woodland, and is considered one of the best examples of this feature in Hertfordshire.
Patmore Heath is a 7.6 hectare biological Site of Special Scientific Interest in East Hertfordshire, 2 kilometres north-east of Albury, Hertfordshire. The site was notified in 1985 under the Wildlife and Countryside Act 1981. Patmore Heath is home to a large amount of dry grass, as well as marshy-areas. Lots of the turf throughout the SSSI is dominated by Deschampsia, as well as occurrences of Anthoxanthum odoratum.
Pegsdon Hills and Hoo Bit is a 79 hectare nature reserve in Pegsdon in Bedfordshire. It is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire. The site is on the border between Bedfordshire and Hertfordshire, and it covers Pegsdon Hills and part of the adjacent Deacon Hill in Bedfordshire, and Hoo Bit in Hertfordshire. It is in the Chilterns Area of Outstanding Natural Beauty, and part of the site is designated by Natural England as the Deacon Hill SSSI.
Herts and Middlesex Wildlife Trust manages over 40 nature reserves covering nearly 810 hectares north of London, in Hertfordshire and the former county of Middlesex, which is now divided between the London boroughs of Barnet, Enfield, Harrow and Hillingdon. It has over 21,000 members, and is one of 47 Wildlife Trusts across the UK. It is a Registered Charity, with its Registered Office in St Albans, and had an income in the year to 31 March 2014 of over £1.5 million.
Rye Meads is a 58.5 hectare biological Site of Special Scientific Interest (SSSI) in Rye House, Hertfordshire. It is one of series of wetlands and reservoirs situated along the River Lea, to the north-east of London. It is part of the Lea Valley RAMSAR site and a Special Protection Area.
Deacon Hill SSSI is a 35.4 hectare biological Site of Special Scientific Interest in Pegsdon in Bedfordshire. It is in the Chilterns Area of Outstanding Natural Beauty, and it is part of the Pegsdon Hills and Hoo Bit nature reserve, managed by Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Fancott Woods and Meadows is a 13.3 hectare Site of Special Scientific Interest near the hamlet of Fancott in Bedfordshire. It was notified under Section 28 of the Wildlife and Countryside Act 1981, and the local planning authority is Central Bedfordshire Council. The site is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.
Old Park Wood is a 16.7-hectare (41-acre) Site of Special Scientific Interest in Harefield in the London Borough of Hillingdon. The south-east part is an 8-hectare (20-acre) nature reserve owned and managed by the Hertfordshire and Middlesex Wildlife Trust.
Leckhampton Hill and Charlton Kings Common is a 63.8-hectare (158-acre) biological and geological Site of Special Scientific Interest in Gloucestershire, notified in 1954. There are five units of assessment.
Puckham Woods is a 32.38-hectare (80.0-acre) biological Site of Special Scientific Interest in Gloucestershire to the east of Cheltenham near Whittington, notified in 1954. The site is listed in the 'Cotswold District' Local Plan 2001-2011 as a Key Wildlife Site (KWS).
Hunsdon Mead is a 34 hectare biological Site of Special Scientific Interest (SSSI) west of Harlow and east of Roydon in Essex. The site is partly in Essex and partly in Hertfordshire, and it is jointly owned and managed by the Essex Wildlife Trust and the Herts and Middlesex Wildlife Trust. The SSSI also includes part of the neighbouring Roydon Mead. The planning authorities are East Hertfordshire District Council and Epping Forest District Council. Hunsdon Mead is registered common land.
Sawbridgeworth Marsh is a 6.3 hectare biological Site of Special Scientific Interest (SSSI) near Sawbridgeworth in Hertfordshire, apart from a small area in the north which is in Essex. It is managed by the Essex Wildlife Trust. The planning authorities are East Hertfordshire District Council and Uttlesford District Council.
Blagrove Common is a 4.0 hectare Site of Special Scientific Interest in Green End near Sandon in Hertfordshire. It is managed by the Hertfordshire and Middlesex Wildlife Trust, and the planning authority is North Hertfordshire District Council.
Tring Woodlands is a 23.8 hectare biological Site of Special Scientific Interest in Tring in Hertfordshire. It is part of the Chilterns Area of Outstanding Natural Beauty and the local planning authority is Dacorum District Council. The wood has a rich flora, showing that it is well established. It is a good example of a semi-natural beech wood in Hertfordshire. Plants that are abundant include woodruff, wood anemone and dog's mercury, and there are a variety of woodland birds. There is access to the wood from Hastoe Hill.
Tewinbury is a 7.5 hectare biological Site of Special Scientific Interest near Tewin in Hertfordshire. The local planning authority is East Hertfordshire District Council, and the site is managed by the Herts and Middlesex Wildlife Trust
Telegraph Hill is a nature reserve near Lilley in north Hertfordshire. Between 1796 and 1814 it was a telegraph station, one of the links in the chain between Great Yarmouth and London during the Napoleanic wars. It is in the Chilterns Area of Outstanding Natural Beauty (AONB), and close to Deacon Hill SSSI. According to the Chilterns AONB the hill is owned by the Herts and Middlesex Wildlife Trust; a notice on the site says that it is managed by the trust, but it is not listed on the trust's web site as one of its reserves.
Danbury Ridge Nature Reserves are a group of nature reserves totalling 101 hectares near Danbury in Essex, England. They are managed by the Essex Wildlife Trust, and most of them are in Sites of Special Scientific Interest (SSSIs). Two areas, the Backwarden and Hitchcock's Meadow, are part of Danbury Common SSSI, and Woodham Walter Common, Birch Wood, Pheasanthouse Wood, Poors Piece, Scrubs Wood, and a small area in Pheasanthouse Farm, are part of Woodham Walter Common SSSI.
Ron Ward's Meadow With Tadley Pastures is a site of Site of Special Scientific Interest (SSSI). It is based on the edge of Tadley in Hampshire, England. It is managed by the Hampshire and Isle of Wight Wildlife Trust.
