Andrena tarsata Nylander,1848

Description and notes

Small bees encountered in the flowers of tormentils (Potentilla spp.) on heaths and moorland should be examined closely as they may include this interesting species (the only British Andrena female to have a tridentate mandible, rather than a uni- or bidentate one). The male is one of a small number of British species to have a largely yellow clypeus.

  Pre 1980   1980-99   2000 and later

The following datasets are included:

  • Bees, Wasps and Ants Recording Society - Bees, Wasps and Ants Recording Society - Trial Dataset

Distribution

Widely distributed throughout Britain as far north as West Sutherland  (Inchnadamph (Loch Assynt)), East Sutherland (Golspie) and the Outer Hebrides (South Uist). In Ireland it has been recorded sporadically from Kerry, Wicklow, Galway, Mayo and Donegal (Stelfox 1927). It has been found on the Isle of Man but not in the Channel Islands. Generally a scarce species, only rarely locally common. A northern European bee, becoming scarcer further south. Stöckhert (1933) describes it as being a boreal-alpine species. The range extends from central Fennoscandia south to Spain, and eastwards to the former Czechoslovakia and USSR.

Status (in Britain only)

This bee is not regarded as being scarce or threatened.

Identification

More images and descriptive notes are available on Steven Falk's Flickr pages here

Habitat

Heathlands and moorlands; rarely open woodland. Present in a wide variety of habitats. Nests are usually made in areas of vertical or sloping bare ground with a southern aspect (Potts & Wilmer 1998). No other habitat limitations known.

Flight period

Univoltine; mid June to late August.

Nesting biology

Apparently nests in compact aggregations (Perkins 1919), though these are very rarely encountered.

Flowers visited

Bramble (Rubus spp.), harebell (Campanula rotundifolia), heather (Calluna vulgaris), wild angelica (Angelica sylvestris) and yarrow (Achillea millefolium).

Parasites

Nomada roberjeotiana is a cleptoparasite of this species (Perkins 1919). Stylopized specimens of A. tarsata have not been found.

Author of profile

G R Else.

Year profile last updated

2005