This piece, which starts out sounding like "Electric Counterpoint" with fewer tracks but does not end that way, is the most striking music I've heard in a long time:
Basic models of flocking behavior are controlled by three simple rules: 1) separation: avoid crowding neighbours (short range repulsion); 2) alignment: steer towards average heading of neighbors; 3) cohesion: steer towards average position of neighbors (long range attraction). With these three simple rules, the flock moves in an extremely realistic way.
@pauline They look like Filter'Trons to me (classic Gretsch pickup), maybe a variant?