Ingrebourne Marshes are a 74.8

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 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 ...

Hornchurch Hornchurch is a suburban town in East London in the London Borough of Havering. It is located east-northeast of Charing Cross. It comprises a number of shopping streets and a large residential area. It historically formed a large ancient par ...

in the

London Borough of Havering The London Borough of Havering () in East London, England, forms part of Outer London. It has a population of 259,552 inhabitants; the principal town is Romford, while other communities include Hornchurch, Upminster, Collier Row and Rainham, Lo ...

. Ingrebourne Valley Local Nature Reserve includes a small part of the SSSI west of the

River Ingrebourne The River Ingrebourne is a tributary of the River Thames 27 miles (43.3 km) in length. It is considered a strategic waterway in London, forming part of the Blue Ribbon Network. It flows through the London Borough of Havering roughly from ...

. The Marshes run along both sides of the river, the northern portion next to

Hornchurch Country Park Hornchurch Country Park is a 104.5-hectare park on the former site of RAF Hornchurch, Hornchurch Airfield, south of Hornchurch in the London Borough of Havering, East (London sub region), east London. Site The River Ingrebourne passes throug ...

and stretching south to Rainham. This is almost all closed to the public, but part of it can be viewed from the Park. A long narrow strip stretches east from the river to Berwick Pond Road, incorporating Berwick Pond, a reservoir which is used for fishing. This is open to the public. The site also includes an irrigation reservoir east of Berwick Pond Road. The site is the largest area of freshwater marsh in Greater London. It is very diverse, with large areas of reed sweet-grass,

common reed ''Phragmites australis'', known as the common reed, is a species of flowering plant in the grass family Poaceae. It is a wetland grass that can grow up to tall and has a cosmopolitan distribution worldwide. Description ''Phragmites australis' ...

swamp, wet neutral grassland and tall fen. These habitats have a wide variety of invertebrates and breeding birds. Invertebrates include sixteen nationally scarce fly, beetle dragonfly and cricket species. There are two nationally rare

Red Data Book The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is an inventory of the global conservation status and extinction risk of biological spe ...

species, the hoverfly '' Anasimyia interpuncta'' and the scarce emerald damselfly '' Lestes dryas''. 61 species of bird regularly breed on the site, such as the

common redshank The common redshank or simply redshank (''Tringa totanus'') is a Eurasian wader in the large family Scolopacidae. Taxonomy The common redshank was formally described by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of hi ...

and the

northern lapwing The northern lapwing (''Vanellus vanellus''), also known as the peewit or pewit, tuit or tewit, green plover, or (in Ireland and Great Britain) pyewipe or just lapwing, is a bird in the lapwing subfamily. It is common through temperate Palearcti ...

Common cuckoo The cuckoo, common cuckoo, European cuckoo or Eurasian cuckoo (''Cuculus canorus'') is a member of the cuckoo order of birds, Cuculiformes, which includes the Geococcyx, roadrunners, the ani (bird), anis and the coucals. This species is a widesp ...

s exploit the nests of

reed warblers The ''Acrocephalus'' warblers are small, insectivorous passerine birds belonging to the genus ''Acrocephalus''. Formerly in the paraphyletic Old World warbler assemblage, they are now separated as the namesake of the marsh and tree warbler famil ...

and

sedge warbler The sedge warbler (''Acrocephalus schoenobaenus'') is an Old World warbler in the genus ''Acrocephalus (bird), Acrocephalus''. It is a medium-sized warbler with a brown, streaked back and wings and a distinct pale supercilium. Sedge warblers are ...

s. Havering Council has raised the water level and reintroduced grazing to protect the wetland.Wild Essex, Ingrebourne Marshes
/ref> Access to the site is from Hornchurch Country Park and Berwick Pond Road.

References

{{SSSIs Greater London Sites of Special Scientific Interest in London Parks and open spaces in the London Borough of Havering Marshland in London

See also

References