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.

Thymallus thymallus - Grayling Fish

Range & Status

A possibly indigenous fish (the Tamar catchment area was stocked with 10,000 fish

between 1899 and 1909) which is essentially a riverine species preferring clean cool

well-oxgenated water in moderately fast-flowing streams. A relatively uncommon fish in Cornwall, restricted to rivers in the extreme east and north-east. Listed in EC Habitats Directive in Annex Va, and in Appendix III of the Bern Convention.


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.