Red tail or Swainson

Yesterday morning there were two different types of hawks in my living room. Both a Red Tail hawk and a Swainson's hawk. There wasn't actually the real thing, just an excellent imitation of their calls. Manzi picked up both of their calls just recently. The Red Tail's have been around lately calling out a lot this past week. Then, two days ago a pair of Swainson's were flying high above our apartments for 10 minutes or so calling out the entire time. Instead of just learning one call, Manzi decided to learn both at roughly the same time. I don't know if imitating the hawk call will be challenging for other hawks keeping them away, or if it is more akin to him learning, "Here kitty, kitty, kitty."