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.
Range & Status
Previously known as N. tormentillae , this species is a cleptoparasite of Andrena tarsata . Recorded widely in Britain from southern England, north to southern Scotland. Its appearance is irregular, being apparently subject to extreme fluctuations in its scarcity and abundance. During the period 1970-1973 G.M. Spooner found the bee to be unexpectantly numerous at several sites in Cornwall; Kit Hill (Callington), Crousa Downs (Lizard Peninsula) and Dozmary Pool (Bodmin Moor). Attempts to relocate the species at these sites in recent years have been unsuccessful. The host species Andrena tarsata also seems to have undergone a dramatic decline and also could not be found at these sites. The June 2004 record of both cleptoparasite and host, near Davidstow Woods (Bodmin Moor) represents one of the few recent records in Britain. This species was also recorded visiting the flowers of Tormentil Potentilla erecta below Rough Tor (Bodmin Moor) in 1996.
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.