Heather Angel / Honey bee (Apis mellifera) forages on pollen in Apple (Malus domestica) flower, collecting pollen in pollen basket. In garden, Surrey, England, UK. May.

John Chan / Honey bees (Apis mellifera) swarming on a fence, Southern California, USA, December.

John Chan / Honey bees (Apis mellifera) swarming on an old gas tank and establishing a new nest site within, with some individuals beating their wings to create air circulation, Southern California, USA, February...

John Chan / Honey bees (Apis mellifera) gathering at the entrance to their nest in a hollowed log, Bolsa Chica Ecological Reserve, California, USA, September.

John Chan / Honey bees (Apis mellifera) gathering at the entrance of their nest in a hollow log, with some returning workers carrying pollen baskets, Bolsa Chica Ecological Reserve, California, USA, October.

Solvin Zankl / Honey bees (Apis mellifera) forming living bridge, Kiel, Germany, June.

Solvin Zankl / Honey bees (Apis mellifera) forming living bridge, Kiel, Germany, June.

Solvin Zankl / Honey bee (Apis mellifera), bees can link up to form a bridge, however in this image the bridge has just collapsed leaving just three bees linked. Kiel, Germany, June.

Solvin Zankl / Honey bees (Apis mellifera) forming living bridge, Kiel, Germany, June.

Clay Bolt / Central bumble bee (Bombus centralis) pollinating wildflowers in the Bridger Range, Bozeman, Montana. August.

Ammonite / Honey bees (Apis mellifera) entering and exiting hive, France, July.

Ammonite / Close-up of Honey bees (Apis mellifera) inside nest, showing honeycomb, France, July.