Appleby Fells is a Site of Special Scientific Interest in the Eden district of Cumbria, England, near Appleby-in-Westmorland. The area is approximately a triangle with a right angle in the North East at Cow Green Reservoir. It extends westwards to near Knock and southwards to near Helbeck. The area overlaps the North Pennines AONB. The fells rise steeply above the Eden Valley, the scarp slope being deeply dissected by streams. Natural England states that "the great importance of the area lies in its rich variety of habitats and associated plant and animal species" and that "geologically there are important exposures of the Great Whin Sill quartz dolerite". According to data from Natural England the condition of 93% of the SSSI is designated "Unfavourable Recovering" and less than 5% is "Favourable".
Allendale Moors is a Site of Special Scientific Interest (SSSI) in Northumberland, England. The upland moorland ridge site is listed for its heath, flush and upland grassland which provide a habitat for a nationally important assemblage of moorland breeding birds.
Allolee to Walltown is the name given to a Site of Special Scientific Interest (SSSI) in Northumberland, England. The site, which follows the path of a section of Hadrian's Wall, is notable for an unusually wide range of grassland types growing on thin soil above the Whin Sill, a rock formation peculiar to the Northern Pennines.
Alnmouth Saltmarsh and Dunes is a Site of Special Scientific Interest (SSSI) in Northumberland, England. It is the largest saltflat on the north-east coast, located on the south bank of the River Aln estuary, and notable for the varied plant community found on the interface between the saltflats and the dunes. It overlaps with and forms part of the much larger Northumberland Shore SSSI.
Arcot Hall Grasslands and Ponds is the name given to a Site of Special Scientific Interest (SSSI) near Cramlington in Northumberland, England, notable as the largest lowland species-rich grassland in North East England. The site is composed of grassland, heath, ponds, and associated damp habitats now rare in Northumberland.
Aules Hill Meadows is the name given to a Site of Special Scientific Interest (SSSI) in Northumberland, England. The site, listed since 1992, is a set of four traditionally managed northern hay meadows, now rare in Northumberland.
Bamburgh Coast and Hills is the name given to a Site of Special Scientific Interest (SSSI) on the coast of north Northumberland, England. The site is one of the longest-standing SSSIs in England, having been listed since 1954, and displays the interaction of a fluid magma rock, now known as the Whin Sill, interacting with older sedimentary rock. Coastal erosion at the site enables sections of the geological strata to be seen. In turn, the soil associated with the Whin Sill gives rise to a distinct pattern of vegetation which on its own merits is at this site found notable.
Barelees Pond is the name given to a Site of Special Scientific Interest (SSSI) in north Northumberland, England. The site is a kettle hole, a deep pond formed in the void remaining after a submerged glacial calf block melted. Barelees Pond is illustrative of vegetative habitat evolution as peat sediment gradually fills the pond.
Campfield Kettle Hole is the name given to a Site of Special Scientific Interest (SSSI) in north Northumberland, England. The site is thought to be the remains of a kettle hole, a pond formed in the void remaining after a submerged glacial calf block melted. In contemporary times Campfield Kettle Hole is a mix of bog and pond.
Barrow Burn Meadows is a Site of Special Scientific Interest (SSSI) in north Northumberland, England. The site is a species-rich hay meadow of a sort now rare in Northumberland.
Beltingham River Shingle is the name given to a Site of Special Scientific Interest (SSSI) in Northumberland in the north-east of England, notable for an unusual community of flora tolerant to the high levels of naturally occurring heavy metals in the sediment of a section of the River South Tyne.
Bewick and Beanley Moors is the name given to a Site of Special Scientific Interest (SSSI) in north Northumberland, in the north-east of England. The moors are asserted to be of national importance by Natural England for the extent, quality and diversity of upland types including heaths, fens, wet grassland, flushes, mires and blanket bogs, together creating an extensive mosaic habitat supporting an exceptional community of amphibians. The moors are important, too, for their relict juniper woodland and scrub.
Billsmoor Park and Grasslees Wood is the name given to a Site of Special Scientific Interest (SSSI) in Northumberland, North East England, designated in 1954. Billsmoor Park is an extensive alder woodland of a sort increasingly uncommon in the county; the much smaller Grasslees Wood is an oak woodland.
Brada Hill is a small hill escarpment near the coast of north Northumberland in North East England, designated as a Site of Special Scientific Interest (SSSI). The 2.4 hectares site is an outcropping of a local stone group, the Whin Sill, on which grows a range of flora representative of the thin, drought-prone soil conditions and influenced by the underlying geology.
Briarwood Banks is the name given to a woodland Site of Special Scientific Interest (SSSI) in north Northumberland, North East England. Composed mainly of elm, oak and ash, the site is semi-natural and now recovering from the removal of planted conifers.
Burnfoot River Shingle and Wydon Nabb is the name given to a Site of Special Scientific Interest (SSSI) in Northumberland, North East England. Burnfoot River Shingle is a calaminarian grassland on the River South Tyne where the local flora is influenced by high levels of naturally occurring heavy metals. Wydon Nabb is an escarpment displaying the Haltwhistle Dyke, a magmatic intrusion of igneous dolerite set amidst sedimentary sandstone and shale.
Longhoughton Quarry is a Site of Special Scientific Interest (SSSI) in north Northumberland in North East England. The site is a now disused quarry which yielded whinstone, a hard dark rock associated in Northumberland with the Whin Sill.
Fallowlees Flush is the name given to a Site of Special Scientific Interest (SSSI) in mid-Northumberland, England. The steeply sloping site has calcium-rich springs supporting vegetation rare in the county.
Farnham Mires is a Site of Special Scientific Interest, or SSSI, to the east of the village of Farnham, North Yorkshire, England. It consists of a spring-fed marshy fen or mire with reeds and sedge, and drier calcareous grassland containing a diverse range of flora. It has a history of poaching and fox hunting, but since the late 19th century, the attention of botanists has been drawn to its large variety of flowering plants. It has received some consideration on this account since 1944, and from 1954 it was designated SSSI status. This site has no facilities, and is not open to the public.
Mar Field Fen is a Site of Special Scientific Interest, or SSSI, north of Masham, North Yorkshire, England, in a rural area known as Marfield. It is situated on land containing woodland carr, fen, spring-fed marshy grassland and drier calcareous grassland, between the River Ure to the east and Marfield Wetland nature reserve to the west. As "one of the best examples of fen habitat in the Vale of York," it is a protected habitat for a variety of plants, including the common butterwort, a carnivorous plant. There is no public access to this site.
