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.

Cassida nebulosa - A tortoise beetle

Range & Status

Very localised in southern England, and has become increasingly scarce and there are few recent records.

Regional Distribution

Until 2008, known from only two records in the 1940' s: West Wood area, Tehidy, and

Menabilly, Fowey, both by F.A. Turk. One found near Churchbridge, north of Looe by Ken Preston-Mafham in 2008.

Habitat & Ecology

Feeds on Goosefoot Chenopodium spp. and Orache Atriplex spp. where they grow in early successional situations such as field margins and waste ground, always on freely draining soils.


Intensification of land use, especially use of herbicides in cereal fields.


Establishment of unsprayed headlands in cereal fields.


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.