https://theconversation.com/we-tracked-male-honeybees-for-two-years-to-find-out-where-they-look-for-sex-161520
...:"Scientists have investigated these supposed congregations by raising a long pole or balloon with either a queen bee in a cage or a “lure” – some cotton wool soaked in the pheromones that queens produce.A trail of drones will often form downwind, competing to try to mate with the queen. One problem with this technique is, because drones are attracted to the lures, we can’t know for sure how they’d behave when the lures aren’t there. Some people suspect the congregations might be created by the scientists themselves."...
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