Cornish Biodiversity Network  -  Supporting Wildlife Recording

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Cornish Red Data (2009)

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.

Idaea degeneraria - Portland Ribbon Wave

Range & Status

Found across southern and central Europe. In Britain, resident at Portland, Dorset, but previously known from Devon (McCormick, 2001). Records from other parts of the southwest, including Bodinnick (September 1962) and St. Agnes, Scilly (August 1996) were thought to be migrants because of their late dates.

Regional Distribution

Scattered records from 2005 to 2008 came from south-east Cornwall and from the Lizard Peninsula. Records in spring from Torpoint in 2005 and 2007 and Downderry in 2006 suggest local breeding, rather than migration.

Habitat & Ecology

Open grassy areas and soft cliffs on the coast.


None known.




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.