Why 'whispers' among bees sometimes evolve into 'shouts'

Let's say you're a bee and you've spotted a new and particularly lucrative source of nectar and pollen. What's the best way to communicate the location of this prize cache of food to the rest of your nestmates without revealing it to competitors, or 'eavesdropping' spies, outside of the colony? One risky way is to "shout" to warn would-be competitors that their prime source of food will be fiercely defended if they show up to the site.

by via Latest Science News -- ScienceDaily