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.

Brachyopa insensilis

Range & Status

Widespread, mainly in southern Britain but also northwards to Midlands and Wales, with isolated records in northern Scotland. This species shows an ability to adapt to habitat change.

Regional Distribution

Recorded at Trencom near St. Ives in 1989.

Habitat & Ecology

Occurs in broadleaved woodland and on hedgerow trees. The adults fly from May to late June, occurring at blossom and sap runs. Larvae develop in sap runs, originally mainly on Elm Ulmus spp.; after the loss of elms due to Dutch Elm disease, B. insensilis has been found on other trees and is clearly adaptable in this respect.


Removal or tidying up of old trees including in hedgerows.




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.