Northern Harrier (Circus hudsonius) is a species of birds (Aves) of the class Aves (Birds) in the family Accipitridae (Hawks, Eagles, and Kites) and order Accipitriformes (Hawks).
Circus ranivorus
Circus maurus
Circus cinereus
Circus spilonotus
Circus aeruginosus
Circus cyaneus
Circus buffoni
Circus macrosceles
Circus pygargus
Circus hudsonius
Circus macrourus
Circus spilothorax
Circus melanoleucos
Circus maillardi
Circus assimilis
Circus approximans