Swarm (formation)

A swarm was a large, disordered group of similar individuals, often aggressive. Many species naturally clustered in the form of swarms, with some swarms becoming thinking gestalt entities.

Moths, (AUDIO: Eclipse) including the flesh moths of the Anti-zone, (TV: It Takes You Away) tended to form swarms. (TV: It Takes You Away, AUDIO: Eclipse)

The Eleventh Doctor recognised the psychic predator who allied with Doctor Simeon as "a flock of space crystals… a swarm". This swarm, reflecting Simeon's intelligence, would go on to evolve into the Great Intelligence. (TV: The Snowmen)