An international team of scientists on 13 February 2012 found that how the bees shook their abdomens when bee-eating hornets approached. This signal triggered the hornet to retreat. The researchers described how all the guards bees simultaneously vibrated their abdomens from side-to-side for a few moments when a hornet approached the colony.
The study done by the scientists revealed that the hornets ( Vespa velutina) responded directly to the bees’ shaking signals.
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