Langham Pond

Langham Pond is a biological Site of Special Scientific Interest north of Egham in Surrey, England.

The pond and its surrounding alluvial meadows on chalk are a unique habitat in southern England. The pond is the remains of an oxbow lake, formed when a meander of the River Thames was bypassed. It contains all four British duckweeds, three nationally scarce plants and a species of fly which has been found nowhere else in Britain, Cerodontha ornata.

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