Walmore Common is a 57.78-hectare (142.8-acre) nature reserve on the flood-plain of the River Severn, west of the city of Gloucester in England and north of the village of Chaxhill. It was notified as a biological Site of Special Scientific Interest in 1966. The site is listed in the 'Forest of Dean Local Plan Review' as a Key Wildlife Site (KWS).
Midger is a 65.7-hectare (162-acre) biological Site of Special Scientific Interest straddling the border of Gloucestershire and South Gloucestershire, notified in 1966 and renotified in 1984. Since the last revision in 1974, the size has been reduced to a 56-hectare (140-acre) site. It lies east of Hillesley, Gloucestershire and north of Hawkesbury Upton, South Gloucestershire. It is at the head of the Kilcott Valley.
Ashleworth Ham is a 104.73-hectare (258.8-acre) biological Site of Special Scientific Interest. It is a large area of grassland on the Severn floodplain, north of Ashleworth in Gloucestershire, England. It is registered as a Site of Special Scientific Interest and was notified in 1974 and renotified in 1985. Ashleworth Ham received this designation because it is one of three sites in the Severn Vale where migratory waterfowl winter.
Brassey is a 2.1-hectare (5.2-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1954 and renotified in 1983. It is situated on the north side of the Windrush Valley, midway between Naunton and Upper Slaughter. The reserve comprises sloping, unimproved limestone pasture. There is a fast-flowing stream. This site is one of the few freshwater marshes in Gloucestershire. The stream joins the River Windrush.
Chaceley Meadow is a 1.8-hectare (4.4-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1954 and renotified in 1993. It lies on the eastern edge of Chaceley village and is about half a mile west of the River Severn.
Daneway Banks is a 17-hectare (42-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1954 and renotified in 1983. It lies half a mile west of Sapperton and is part of a group of wildlife sites in the Frome Valley that includes Siccaridge Wood and Sapperton Canal reserves. The site is in the Cotswold Area of Outstanding Natural Beauty.
Stenders Quarry is a 2.8-hectare (6.9-acre) biological and geological Site of Special Scientific Interest in the Forest of Dean, Gloucestershire, England, notified in 1966 and renotified in 1990. The site is designated as an SSSI for its important geological features, although there is also a diversity of plants and animals recorded.
Wotton Hill is a hill on the edge of the Cotswold Hills in Gloucestershire, England, 0.5 miles (0.80 km) north of Wotton-under-Edge. The Cotswold Way passes over the hill.
Dymock Woods is a 53-hectare (130-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1990. The site is listed in the 'Forest of Dean Local Plan Review' as a Key Wildlife Site (KWS).
Hobbs Quarry, Longhope is a 1-hectare (2.5-acre) geological and biological Site of Special Scientific Interest in Gloucestershire, England, notified in 1966. It is situated midway between Longhope and Dursley Cross in the Forest of Dean. Adjacent woods are Kiln Wood and Coleman's Wood. The site was managed by the Gloucestershire Wildlife Trust. Ownership changed to an independent Charitable Trust - Hobbs Nature Reserve Trust - on 1 August 2023. The Management Plan is similar to the one GWT had agreed with Natural England, combining conservation and research work on the geological exposures and preservation of the valuable natural environment. An explanatory website is under development to aid any groups planning educational visits. Local specialists are available to assist with these if required.
Clarke's Pool Meadow is a 1.8-hectare (4.4-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1997. It lies on the flat top of 'Old Hill' about half a mile south of Blakeney. The site consists of two fields which were purchased by the Gloucestershire Wildlife Trust in 1997. The site was designated an SSSI in the same year and it is one of the finest surviving traditional hay meadows in Gloucestershire.
Collinpark Wood is a 66.69-hectare (164.8-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1966, revised in 1974 and renotified in 1983. There was a boundary change in 1983. There are seven units of assessment. Unit 1 is a 15-hectare (37-acre) area owned and managed by the Gloucestershire Wildlife Trust. The trust purchased this part of the wood in 1979 with grant aid from WWF. The site is listed in the 'Forest of Dean Local Plan Review' as a Key Wildlife Site (KWS).
Swift's Hill is a 9.15-hectare (22.6-acre) biological and geological Site of Special Scientific Interest in Gloucestershire, notified in 1966 and renotified in 1984.
Salmonsbury Meadows is an 18-hectare (44-acre) biological and geological Site of Special Scientific Interest in Gloucestershire, notified in 1985. The site is listed in the 'Cotswold District' Local Plan 2001-2011 as a Key Wildlife Site (KWS).
Astridge Wood is a 19.42-hectare (48.0-acre) biological Site of Special Scientific Interest in Gloucestershire, England, notified in 1985. The site is listed in the 'Forest of Dean Local Plan Review' as a Key Wildlife Site (KWS).
Cotswold Commons and Beechwoods is a 665.5-hectare (1,644-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1954.
Highbury Wood is a 50.74-hectare (125.4-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1983.
Hornsleasow Roughs is a 28.24-hectare (69.8-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1954.
Tudor Farm Bank is a 3.68-hectare (9.1-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1999.
Yarley Meadows is a 12.2-hectare (30-acre) biological Site of Special Scientific Interest in Gloucestershire, England, notified in 1987.
