Social insects have evolved different ways of sharing information about many aspects of their everyday life. In contrast to solitary insects, each decision taken by a colony member-for example, about where to forage or which food site to exploit-is no longer solely based on the individual’s own experience, but involves the integration of information from other nestmates. The sharing of information between workers is the essence of sociality, because it is a prerequisite for the coordination of groups, whatever their size-from a few individuals up to several thousands of workers, as is the case in mature colonies of army ants.