The release of a pheromone by a leader ant that recruits a nest mate for tandem running: Tandem calling, also termed "tandem running", involves odor signals used by scouts that employ chemical cues to lead then back to the source of food, or help to attract others in the nest.

A form of communication, used by the workers of certain ant species during exploration or recruitment: During tandem running, one individual follows closely behind another ant, frequently contacting the abdomen of the leader with its antennae.