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
The females of this bee are very much darker haired on the sides of the thorax and on the abdomen, and also have more brightly coloured hairs on the upper surface of the thorax, than their mainland counterparts. They are found in both inland and coastal locations on all the inhabited islands. Here they are found nesting, often in large colonies, in exposed vertical faces of periglacial head. The bees are most active and numerous in April and May continuing into June. Richards (1978) describes the Scillonian and similar Channel Island form as a distinct subspecies.
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.