Phil Savoie / White tailed bumblebee (Bombus lucorum), flying to White clover (Trifolium repens) flowers, Monmouthshire, Wales, UK. July.

Phil Savoie / Red tailed bumblebee (Bombus lapidarius) queen feeding on White clover (Trifolium repens) flowers, Monmouthshire, Wales, UK. July.

Dave Bevan / White-tailed bumblebee (Bombus lucorum) nectaring on Sedum (Sedum), Carmarthenshire, Wales, UK. September.

Steve Downer / Buff-tailed bumblebee (Bombus terrestris) and Red-tailed bumblebee (Bombus lapidarius) nectaring, Birmingham, England, UK, July.

Steve Downer / Buff-tailed bumblebee (Bombus terrestris) nectaring, Birmingham, England, UK, July.

Nick Upton / Slow motion close up view of a White-tailed bumblebee (Bombus lucorum) using its middle legs to fend off a Marbled white butterfly (Melanargia galathea) whilst nectaring on Creeping thistle flowers (C...

Nick Upton / Wide angle clip of Marbled white butterflies (Melanargia galathea) and White-tailed bumblebees (Bombus lucorum) flying around and nectaring on Creeping thistle (Cirsium arvense) flowers, Wiltshire, En...

Nick Upton / Slow motion wide angle clip of Marbled white butterflies (Melanargia galathea) and a White-tailed bumblebee (Bombus lucorum) flying around and nectaring on Creeping thistle (Cirsium arvense) flowers,...

Nick Upton / Buff-tailed bumblebee (Bombus terrestris) nectaring on Bramble flowers (Rubus plicatus) on a woodland edge, Lower Woods Gloucestershire Wildlife Trust reserve, England, UK, July.

Rod Williams / Hoverfly (Volucella bombylans) female, a White-tailed Bumblebee mimic, Sutcliffe Park Nature Reserve, Eltham, London, UK July

Laurent Geslin / White tailed bumblebee (Bombus lucorum) taking off from flower in urban park, Grenoble, France, May 2012.

Rod Williams / White-tailed bumblebee (Bombus lucorum) feeding on Knapweed, and showing a pair of pollen sacs Sutcliffe Park Nature Reserve, Eltham, London, UK. June