Hmmm... Cultist glitch... I have a permanent flock of 9 even though the only bird shown is the leader. Even as I write this, my 'flock' has been flying for 500 seconds, accumulating a flight score of 2.5 million. I started purposely crashing the bugger into every vehicle and painting them red with my blood but still he tanks onwards!
 "Endless Migration"){kind=icon}