The descriptive text, below the map, is from the Cornish Red Data Book (2009). The map on this web page depicts the organisms distribution and shows the records made pre-2000 and those made since.
Range & Status
A very localised species of southern and south-eastern Britain, and has become
increasingly scarce in recent years.
Two old records: Penzance and Pencalenick (1906).
Habitat & Ecology
A wetland species found in fens, marshes and well-vegetated lakesides, generally near the coast.
The habitat of the species is susceptible to artificial drainage improvements for agriculture or other development.
Protection of all remaining undisturbed wetlands.
I.J. Bennallick, S. Board, C.N. French, P.A. Gainey, C. Neil, R. Parslow, A. Spalding and P.E. Tompsett. eds. 2009. Red Data Book for Cornwall and the Isles of Scilly. 2nd Edition.Croceago Press.
The Cornish Red Data Book Project was led by the Cornwall and Isles of Scilly Federation for Biological Recorders (CISFBR). The full text and species accounts (minus the maps) are available on the CISFBR website.