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
Widespread in Britain except in the south-east, with about 20 post-1960 sites mostly in north or west. Recently downgraded from RDB2.
Recorded at Gwendreath (1980-1).
Habitat & Ecology
The semi-aquatic larvae develop in the exposed peat of bogs and fens; the adults fly
between May and August.
Drainage and water extraction.
The Cornish site is in the Lizard National Nature Reserve.
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.