The study only shows that the "alarm call" is sounded also under circumstances where no threatening predator is around. The very label "alarm call" is, therefore misguided, and bound to mislead investigators by sending them in the wrong direction.\n\nWhen the call is made by a monkey that spotted a predator, he himself undoubtedly quickly scampers away, and the others respond in kind, either because they see him running away,or because they quickly scan their environment, and respond by running away , when they spot the predator themselves. \n\nIn the study described here, no threatening predator was involved at all, and the caller himself did not run away. Moreover, the authors state that invariably AT LEAST ONE of the already feeding monkeys ran away; which means that the others did not, either because the caller did not run away, or because they looked around and could spot no predator.\n\nThe only interesting problem the study raises is why do some of the monkeys respond by running away, while others do not, and does the response of individuals change with their experience. This requires studying the ontogeny, (development in the individual organism), of the response to such calls; which requires knowing the previous experience of each individual. And such a study should not even be seriously contemplated by using a wild population, where nothing is known, or can be known, about the previous experience of different individuals. One might even need to study the ontogeny of the preference for bananas, before considering the possibility that the caller made the call with an intention to scare others away, and, thus, gain access to the bananas.\n\nThe idea that if humans deceive, (undoubtedly for very different reasons, in different situations), sub-human animals, (even if they are our closest relatives), must be able to do the same, is a very naive, and misguided approach to the study of animal behavior.\n\nYou can wait from here to eternity, and I bet you will never encounter a monkey typing and sending a comment to The Scientist. Just think of that!