A Praying Mantis Consuming a Fruit Fly (IMAGE) McGill University Caption Researchers have discovered that the fear of predators causes flies to spend less time eating, more time being vigilant, have less sex, and produce fewer offspring Credit Ian Dworkin Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.