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 widespread species in southern England which has undergone a recent, rapid decline. Once widespread and relatively frequent in west and east Cornwall, it is now fairly rare, however, Cornwall is still regarded as one of the strongholds for this species. There are at least 10 post-1980 Cornish sites, mainly coastal, but also inland. Several good, strong populations have very recently been identified on Crousa Downs (Lizard Peninsula), West Penwith and along the coast from Bude to Morwenstow on the north-east coast of Cornwall.
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.