Elephant scarer

Elephants will turn tail (and trunk) if they hear the buzz of bees say Oxford University researchers trying to find a way of keeping them away from villages. They set up recordings of buzzing and, for the moment, they are effective as elephant scarers, but they fear that elephants may soon understand the con.

It's not just the elephants that are smart, the bees are no dummies either -- they sting elephants inside their trunks.