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.

Lasius umbratus

Range & Status

Distributed throughout the British Isles, but commoner in the south of England.

Regional Distribution

Recently recorded from West Cornwall, but probably under-recorded. Last recorded from the Isles of Scilly in 1970.

Habitat & Ecology

Found on sea cliffs, under stones or tree stumps. The nests are founded by invading the nests of Lasius alienus and Black Garden Ant Lasius niger . Tolerant of full shade.


No known threats.

00 Conservation



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.