Large Garden Bumblebee - Bombus ruderatus

A large bumblebee with a very long tongue, which is often held outstretched as the bee approaches a flower. Separating B. ruderatus and its close relative B. hortorum is very difficult, and there is considerable variability in the extent and brightness of the colour bands and the tail colour. However all-black (including tail) specimens are most likely to be B. ruderatus (named as variety harrisellus). 

All red-rated records should include a photo, or set of photos, showing the key characters, which may require the specimen. Please include a face shot, side, top and wings.  Note whether male or female, explain how the specimen met the key characters and the key used.  We will accept records identified by a recognised local or national expert, or that have been identified via the BWARS’ Facebook noting the name of the person/organisation identifying the record (e.g. ‘Stuart Roberts, BWARS Facebook’).

Modern populations appear to have become centred on extensive river-valley systems in southern and central England, where it forages at plants such as Comfrey, Yellow Iris and Marsh Woundwort. However, it has recently shown a great liking for the legume-dominated ‘Pollen and Nectar Margins’ being promoted as part of Agri-environment programmes. Following the establishment of these mixtures it has re-appeared in a number of localities.

Queens emerge from hibernation from April to June; workers are present from May, and males and new females from July to October. The colony cycle of this species is slightly later than that of is congener B. hortorum.

In addition to the foraging plants mentioned above it is one of the three species found visiting very deep blooms such as Foxglove and Honeysuckle (the others being B. pascuorum and B. hortorum).

In Britain it is much more southerly than Bombus hortorum in its distribution and is considered to be in major decline. It is classed as Nationally Scarce B.

Status in Leicestershire and Rutland not known.