Living bridges formed by army ants are among the most striking examples of collective behavior in social insects, previously known only from New World Eciton species. Here, we report the field observation of living bridge formation in an Old World army ant, Aenictus glabrinotum. We artificially created a small gap in the foraging trail, formed on a twig, to disrupt traffic flow. Ants accumulated near the opening, explored the air space, and interlinked their bodies to form a living bridge, allow