Rational Monkeys

It appears that even monkeys understand the notion of deterrence. At the very least, they at least respond in the way economics predicts: the more costly something is the less they do of something.

They say the monkeys are more afraid of young men than women and children, and the bolder ones throw stones and chase the women from their farms.

Nachu's women have tried wearing their husbands' clothes in an attempt to trick the monkeys into thinking they are men - but this has failed, they say.

"When we come to chase the monkeys away, we are dressed in trousers and hats, so that we look like men," resident Lucy Njeri told the BBC News website

"But the monkeys can tell the difference and they don't run away from us and point at our breasts. They just ignore us and continue to steal the crops."