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.

Cottus gobio - Miller's Thumb

Range & Status

This small bottom-living species inhabits a wide variety of rivers, streams and lakes. It favours fast-flowing, clear shallow water with gravel/cobble/pebble substrate. In more lowland rivers it can also occur on softer substrates provided that the water is welloxygenated and that there is sufficient cover. A widespread species which is often common in rivers in Britain and across Europe. Cottus gobio is listed in EC Habitats Directive in Annex IIa and is a Species of Conservation Concern.


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.