Tewinbury is a biological Site of Special Scientific Interest near

Tewin Tewin is an English village and civil parish in Hertfordshire, England between the towns of Welwyn Garden City, Stevenage, Welwyn (village) and the county town Hertford, it is within commuting distance of London. Tewin Wood is a very affluent re ...

in Hertfordshire. The local planning authority is

East Hertfordshire District Council East or Orient is one of the four cardinal directions or points of the compass. It is the opposite direction from west and is the direction from which the Sun rises on the Earth. Etymology As in other languages, the word is formed from the f ...

, and the site is managed by the

Herts and Middlesex Wildlife Trust Herts and Middlesex Wildlife Trust manages over 40 nature reserves covering nearly north of London, in Hertfordshire and the historic county of Middlesex, part of which is divided between the London boroughs of Barnet, Enfield, Harrow and Hill ...

The site borders the

River Mimram The River Mimram is a river in Hertfordshire, England. Geography The river valley known locally as the Mimram Valley is named after the River Mimram, which rises from a spring to the north-west of Whitwell, in North Hertfordshire, England, a ...

. It has

alluvial Alluvium (from Latin ''alluvius'', from ''alluere'' 'to wash against') is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. All ...

meadows and marshes which are rare in lowland Britain. There are areas of swamp and tall fens, with plants including

butterbur ''Petasites'' is a genus of flowering plants in the sunflower family, Asteraceae, that are commonly referred to as butterburs and coltsfoots.angelica ''Angelica'' is a genus of about 60 species of tall biennial and perennial herbs in the family Apiaceae, native to temperate and subarctic regions of the Northern Hemisphere, reaching as far north as Iceland, Lapland, and Greenland. They gr ...

. Otters have been observed on the riverbank, in possibly the only site in the county. There is also an area of ash and willow woodland. There is a lagoon which has a two storey hide for observing birds and water voles. Access to the site is in the drive to the Tewin Bury Farm Hotel on Hertford Road. There is a car park, which also serves the hotel, but no public access apart from the hide and a small area called Orchard Meadow behind the car park.

References

{{coord, 51.8095, -0.1679 , type:landmark_region:GB-BNE, display=title Sites of Special Scientific Interest in Hertfordshire Herts and Middlesex Wildlife Trust reserves East Hertfordshire District