A tiny group of bees act like "pied pipers" to trigger the onset of bee swarms report scientists. By buzzing a "piping" signal the bees are able to initiate an explosive departure from the hive. Bees are known to use signals to tell the colony when to swarm but which bees had the power to make this decision was unclear. Now scientists have identified a small oligarchy of individual bees that hold the key to swarm behaviour.
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