Deadman () is a 28.8

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. ...

(71.2 acre)

biological 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 ...

on the edge of the

Blackdown Hills The Blackdown Hills, or Blackdowns, are a range of hills along the Somerset-Devon border in south-western England. The plateau is dominated by hard chert bands of Upper Greensand with some remnants of chalk, and is cut through by river valleys. ...

, near Buckland St Mary south of

Taunton Taunton () is the county town of Somerset, England. It is a market town and has a Minster (church), minster church. Its population in 2011 was 64,621. Its thousand-year history includes a 10th-century priory, monastic foundation, owned by the ...

Somerset Somerset ( , ), Archaism, archaically Somersetshire ( , , ) is a Ceremonial counties of England, ceremonial county in South West England. It is bordered by the Bristol Channel, Gloucestershire, and Bristol to the north, Wiltshire to the east ...

, notified in 1987. Deadman is one of the best remaining examples of a mixed valley mire in Somerset. It contains a rich mosaic of wet heath, bog pools and birch/willow carr grading into acid marshy grassland. These communities support several species of plant which are rare in the county. Ground water issues from numerous springs within the

greensand Greensand or green sand is a sand or sandstone which has a greenish color. This term is specifically applied to shallow marine sediment that contains noticeable quantities of rounded greenish grains. These grains are called ''glauconies'' and co ...

producing a locally raised water table and shallow peaty surface horizon. It is at these points that bog communities develop, characterised by the floating leaves of bog pondweed (''Potamogeton polygonifolia''), bog bean (''Menyanthes trifoliata'') and marsh St John's-wort (''Hypericum elodes''). In places this wet heath has undergone a transition to

birch A birch is a thin-leaved deciduous hardwood tree of the genus ''Betula'' (), in the family Betulaceae, which also includes alders, hazels, and hornbeams. It is closely related to the beech- oak family Fagaceae. The genus ''Betula'' contains 3 ...

(''Betula'' sp.) and

willow Willows, also called sallows and osiers, of the genus ''Salix'', comprise around 350 species (plus numerous hybrids) of typically deciduous trees and shrubs, found primarily on moist soils in cold and temperate regions. Most species are known ...

(''Salix'' sp.) carr. This provides an important habitat for breeding

nightingale The common nightingale, rufous nightingale or simply nightingale (''Luscinia megarhynchos''), is a small passerine bird which is best known for its powerful and beautiful song. It was formerly classed as a member of the thrush family Turdidae, ...

s and grasshopper warblers.

References

{{SSSIs Somerset biological Sites of Special Scientific Interest in Somerset Sites of Special Scientific Interest notified in 1987