Any member of the order Falconiformes ( eagle s, falcon s, hawk s, and vulture s) or Strigiformes ( owl s).
Falconiforms are also called raptor s. They are active during the day, whereas owls are nocturnal. Condor s and eagles are among the largest and strongest of flying birds. All birds of prey have a hook-tipped beak and sharp curved claws called talons. (Nonpredatory vultures have less-developed talons.) Despite the similarities between owls and raptors, many authorities believe they are not closely related but developed similar features because of their similar predatory lives.