As reported by George Kennedy in his book Comparative Rhetoric:

Messenger bees go out searching and report their findings back to the swarm by means of waggle dances that indicate the direction of the cavity; the suitability of the cavity is expressed by ther energy exhibited in the dance: The more suitable the place, the more vigorous the bee’s performance. What is especially interesting is that bees that have discovered only mediocre cavities sometimes are persuaded by the energetic dance of another bee and become followers of one who has found a better possibility. They fly out to investigate the report firsthand and then return to dance a new, more excited, dance indicating their support of the alternative cavity. Gradually, a consensus develops about what is in the best interest of the swarm and the queen then takes flight to the site chosen by the group.

Ah, consensus building among beings with the sense and flexibility to change direction when confronted with new evidence. If only our own collective decisions could be made so effectively!