Bratton Downs () is a 395.8

hectare The hectare (; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm2), that is, square metres (), and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. ...

biological and geological

Site of Special Scientific Interest A Site of Special Scientific Interest (SSSI) in Great Britain, or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland, is a conservation designation denoting a protected area in the United Kingdom and Isle ...

in Wiltshire, England, near the villages of Bratton and Edington, and about east of the town of Westbury. It was notified in 1971. The designated area consists mainly of chalk grassland, as well as some

ancient woodland In the United Kingdom, ancient woodland is that which has existed continuously since 1600 in England, Wales and Northern Ireland (or 1750 in Scotland). The practice of planting woodland was uncommon before those dates, so a wood present in 1600 i ...

, and supports a diverse range of native flora and fauna. It overlays notable geological features—principally landforms created by glaciation in the

Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

. Part of the land designated as Bratton Downs

is owned by the

Ministry of Defence A ministry of defence or defense (see American and British English spelling differences#-ce.2C -se, spelling differences), also known as a department of defence or defense, is the part of a government responsible for matters of defence and Mi ...

Location

The Bratton Downs SSSI includes parts of the Westbury, Combe, White Cliff, Picquet, Patcombe and Edington Hills, as well as the Combe Bottom, Longcombe Bottom and Lutcombe Bottom

combe A combe (; also spelled coombe or coomb and, in place names, comb) can refer either to a steep, narrow valley, or to a small valley or large hollow on the side of a hill; in any case, it is often understood simply to mean a small valley through w ...

s. The

Wessex Ridgeway The Wessex Ridgeway is a long-distance footpath in southwest England. It runs from Marlborough in Wiltshire to Lyme Regis in Dorset, via the northern edge of Salisbury Plain and across Cranborne Chase AONB. The footpath was opened in 1994. At ...

long-distance footpath passes through part of the SSSI. The

Westbury White Horse Westbury White Horse or Bratton White Horse is a hill figure on the escarpment of Salisbury Plain, approximately east of Westbury in Wiltshire, England. Located on the edge of Bratton Downs and lying just below an Iron Age hill fort, it is ...

is on the slope of Westbury Hill, on the edge of Bratton Downs.

Bratton Camp Bratton Castle (also known as Bratton Camp) is a bivallate (two ramparts) Iron Age built hill fort on Bratton Down, at the western edge of the Salisbury Plain escarpment. The hill fort comprises two circuits of ditch and bank which together encl ...

, an

Iron Age The Iron Age () is the final epoch of the three historical Metal Ages, after the Chalcolithic and Bronze Age. It has also been considered as the final age of the three-age division starting with prehistory (before recorded history) and progre ...

hill fort A hillfort is a type of fortification, fortified refuge or defended settlement located to exploit a rise in elevation for defensive advantage. They are typical of the late Bronze Age Europe, European Bronze Age and Iron Age Europe, Iron Age. So ...

, stands on a top immediately east of the horse; the fort is surrounded by the designated area but does not form part of it.

Vegetation

The main species of grass is upright brome ('' Bromus erectus''), though tor-grass (''

Brachypodium pinnatum ''Brachypodium pinnatum'', the heath false brome or tor-grass, is a species of grass with a widespread distribution in temperate regions of the Northern Hemisphere. It typically grows in calcareous grassland, and reaches tall. The flowerhead is ...

'') is also common. In areas of heavy grazing, sheep fescue (''

Festuca ovina ''Festuca ovina'', sheep's fescue or sheep fescue, is a species of grass. It is sometimes confused with hard fescue (''Festuca trachyphylla''). General description It is a perennial plant sometimes found in acidic ground, and in mountain pastur ...

'') and meadow oat-grass ('' Helictotrichon pratense'') can take over. Blue sedge (''

Carex flacca ''Carex flacca'', with common names blue sedge, gray carex, glaucous sedge, or carnation-grass, (syn. ''Carex glauca''), is a species of sedge native to parts of Europe and North Africa.

''), spring sedge ('' Carex caryophyllea''), dwarf thistle (''

Cirsium acaule ''Cirsium acaule'' or ''acaulon'' has the English name dwarf thistle or stemless thistle. It is widespread across much of Europe.

''), salad burnet (''

Sanguisorba minor ''Sanguisorba minor'', the salad burnet, garden burnet, small burnet, burnet (also used for ''Sanguisorba'' generally), :wiktionary:pimprenelle, pimpernelle, Toper's plant, and burnet-bloodwort, is an edible perennial plant, perennial herbaceou ...

''), burnet saxifrage ('' Pimpinella saxifraga''), and devil's bit (''

Succisa pratensis ''Succisa pratensis'', also known as devil's-bit or devil's-bit scabious, is a flowering plant in the honeysuckle family Caprifoliaceae. It differs from other similar species in that it has four-lobed flowers, whereas '' Scabiosa columbaria'' ( ...

'') are also common. Common sainfoin (''

Onobrychis viciifolia ''Onobrychis viciifolia'', also known as ''O. sativa'' or common sainfoin () was an important forage legume in temperate regions until the 1950s. During the Green Revolution it was replaced by high yielding alfalfa and clover species. Due to its ...

''), fern-leaf dropwort (''

Filipendula vulgaris ''Filipendula vulgaris'', commonly known as dropwort or fern-leaf dropwort, is a perennial herbaceous plant in the family Rosaceae, closely related to meadowsweet (''Filipendula ulmaria''). It is found in Europe, western Siberia, Asia Minor, the ...

''), autumn lady's-tresses (''

Spiranthes spiralis ''Spiranthes spiralis'', commonly known as autumn lady's-tresses, is an orchid that grows in Europe and adjacent North Africa and Asia. It is a small grey-green plant. It forms a rosette of four to five pointed, sessile, ovate leaves about in le ...

''), chalk milkwort ('' Polygala calcarea'') and fragrant orchid (''

Gymnadenia conopsea ''Gymnadenia conopsea'', commonly known as the fragrant orchid or chalk fragrant orchid, is a herbaceous plant of the family Orchidaceae native to northern Europe. Etymology The name of the genus ''Gymnadenia'' is formed from Greek words (', ...

'') are notable grassland species that only grow in areas where fertilisers and herbicides have not been used for a long time. Patches of scrub with emergent tree species have developed on slopes, common components of which are hawthorn (''

Crataegus ''Crataegus'' (), commonly called hawthorn, quickthorn, thornapple, Voss, E. G. 1985. ''Michigan Flora: A guide to the identification and occurrence of the native and naturalized seed-plants of the state. Part II: Dicots (Saururaceae–Cornacea ...

'' sp.), buckthorn ('' Rhamnus'' spp.), blackthorn (''

Prunus spinosa ''Prunus spinosa'', called blackthorn or sloe, is an Old World species of flowering plant in the rose family, Rosaceae. It is locally naturalized in parts of the New World. The fruits are used to make sloe gin in Britain and patxaran in B ...

''), common holly (''

Ilex aquifolium ''Ilex aquifolium'', the holly, common holly, English holly, European holly, or occasionally Christmas holly, is a species of flowering plant in the family Aquifoliaceae, native to western and southern Europe, northwest Africa, and southwest As ...

''), wayfaring tree (''

Viburnum lantana ''Viburnum lantana'', the wayfarer or wayfaring tree, is a species of ''Viburnum'', native to central, southern and western Europe (north to Yorkshire in England), northwest Africa, and southwestern Asia.Blamey, M. & Grey-Wilson, C. (1989). ''Fl ...

''), ash (''

Fraxinus excelsior ''Fraxinus excelsior'', known as the ash, or European ash or common ash to distinguish it from other types of ash, is a flowering plant species in the olive family Oleaceae. It is native throughout mainland Europe east to the Caucasus and Alb ...

''),

whitebeam The whitebeams are members of the family Rosaceae, tribe Malinae, comprising a number of deciduous simple or lobe-leaved species formerly lumped together within ''Sorbus'' s.l. Many whitebeams are the result of extensive intergeneric hybridisa ...

and field maple (''

Acer campestre ''Acer campestre'', known as the field maple, is a flowering plant species in the family Sapindaceae. It is native plant, native to much of continental Europe, Britain, southwest Asia from Turkey to the Caucasus, and north Africa in the Atlas Mou ...

''). Ash and wych elm (''

Ulmus glabra ''Ulmus glabra'', the wych elm or Scots elm, has the widest range of the European elm species, from Ireland eastwards to the Ural Mountains, and from the Arctic Circle south to the mountains of the Peloponnese and Sicily, where the species reach ...

'') form two stands on north-facing slopes on the eastern margins of the downs. The ground cover in these woods contains several species typical of those found in ancient woodland.

Fauna

Notable bird species reported in the downs include the

lesser whitethroat The lesser whitethroat (''Curruca curruca'') is a common and widespread typical warbler which breeds in temperate Europe, except the southwest, and in the western and central Palearctic. This small passerine bird is strongly migratory, winterin ...

common linnet The common linnet (''Linaria cannabina'') is a small passerine bird of the finch family, Fringillidae. It derives its common name and the scientific name, ''Linaria'', from its fondness for hemp seeds and flax seeds—flax being the English na ...

yellowhammer The yellowhammer (''Emberiza citrinella'') is a passerine bird in the Emberiza, bunting family that is native to Palearctic, Eurasia and has been introduced species, introduced to New Zealand and Australia. Most European birds remain in the br ...

goldcrest The goldcrest (''Regulus regulus'') is a very small passerine bird in the kinglet family. Its colourful golden Crest (feathers), crest feathers, as well as being called the "king of the birds" in European folklore, gives rise to its Englis ...

and European green woodpecker. More than thirty species of butterfly have been reported from the area, several of which—the

marsh fritillary The marsh fritillary (''Euphydryas aurinia'') is a butterfly of the family Nymphalidae. Commonly distributed in the Palearctic region, the marsh fritillary's common name derives from one of its several habitats, marshland. The prolonged larval st ...

(''Euphydryas aurinia''), Duke of Burgundy (''

Hamearis lucina ''Hamearis lucina'', the Duke of Burgundy, the only member of the genus ''Hamearis'', is a European butterfly in the family Riodinidae. For many years, it was known as the "Duke of Burgundy fritillary", because the adult's chequered pattern is s ...

''),

chalkhill blue The chalkhill blue (''Lysandra coridon'') is a butterfly in the family Lycaenidae. It is a small butterfly that can be found throughout the Palearctic realm, where it occurs primarily in grasslands rich in chalk. Males have a pale blue colour, wh ...

(''Polyommatus coridon''), pearl-bordered fritillary (''Boloria euphrosyne'') and Adonis blue (''Polyommatus bellargus'')—are declining in the United Kingdom on account of

habitat destruction Habitat destruction (also termed habitat loss or habitat reduction) occurs when a natural habitat is no longer able to support its native species. The organisms once living there have either moved elsewhere, or are dead, leading to a decrease ...

. Other insects reported include the uncommon burrowing bug species '' Canthophorus dubius'', the green forester ('' Adscita statices''), cistus forester ('' A. geryon''), and scarce forester ('' Jordanita globulariae'').

References

{{coord, 51.2689, N, 2.1089, W, region:GB_source:enwiki-osgb36(ST925522), display=title Sites of Special Scientific Interest in Wiltshire Sites of Special Scientific Interest notified in 1971 Hills of Wiltshire Bratton, Wiltshire