A flock of low-poly birds self-organizes into a dynamic V formation as it migrates along a slow circular flight path. Each bird lerps toward an assigned slot offset from the flock's heading (side/up/back), mimicking how real birds ride the wingtip vortex of the bird ahead to save energy. Every few seconds leadership rotates to a new bird and every other bird's slot is recomputed relative to the new leader, so the V constantly reforms. Wingbeats are driven by independent per-bird phase/speed offsets layered on top of the shared formation motion.