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 European species, but restricted to the southern part of Britain.
Discovered near Polperro many years ago, and only twice subsequently: by Stella Turk at the Dizzard in 1985 and by Chris Haes on Loggans Moor in 1995.
Habitat & Ecology
A species of damp open situations, where it feeds on Greater Bird' s-foot-trefoil Lotus
pedunculatus . Relatively immobile and confined to sites with a long history of suitable conditions. Warmth, humidity and shelter are important: tied to woodland over much of its British range, but seacliffs provide suitable conditions in the south west.
Changes in management of cliff and moor, especially abandonment of grazing.
The balance between overgrazing eliminating the foodplant and under-grazing allowing scrub development can be difficult. Maintenance of light grazing regimes is essential. The Dizzard locality lies on National Trust land.
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.