 Successful breeding and pair bonds, however, do not usually occur until 4 to 5 years of age.Several potential predators are known, being almost exclusively avian raptors.These include white-throated hawks ("Buteo albigula"), variable hawks ("B. polyosoma"), bicolored hawks ("Accipiter bicolor"), and southern crested caracaras ("Caracara plancus") (the latter most likely a predator only of young).