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
Nationally declined. Strongest populations in East Anglia and the south midlands. Some possible recovery as a result of new agri-environment schemes (Baldock, 2007).
Probably extinct in Cornwall; most recently recorded in 1965. Similar to B. hortorum and may have been misidentified and/or under-recorded. Clark in 1907 reports it fairly common around Truro (Almond, 1975).
Habitat & Ecology
It is long tongued and underground nesting, associated with long tubed flowers such as White Dead-nettle Lamium album , Marsh Woundwort Stachys palustris , Black Horehound Ballota nigra and Common Comfrey Symphytum officinale , often in river corridors. It is also associated with Red Clover Trifolium pratense in more general habitats. It occurs in a completely black form often alongside banded forms.
Not applicable in Cornwall.
Restoration of large areas of Red Clover Trifolium pratense . Re-introduction possibly
necessary as the nearest populations are probably too far away to recolonise.
This species is listed on the Biodiversity Action Plan (BAP) middle list as a globally
threatened/declining species (BSGR, 1995). BAP species (2007).
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.