abstract: We study long time behaviour of certain multi-agent dynamical systems, where each agent moves according to a strategy which takes into account the positions of neighbouring agents within some given visibility radius (thus in particular the communication graph is time variant). The agents distribution can be discrete or continuous in space, as well as the time variable can take discrete or continuous values. Our main results concern the existence of a limiting distribution for long times, thus proving that these models produce a local aggregation effect.