Western Marsh Harrier, Circus aeruginosus Morten Jørgen Didriksen Creative Commons Attribution-NoDerivs.

Northern Harrier, Circus cyaneus "Low-flying harrier" by Wolfpix via Flickr, Creative Commons Attribution-NoDerivs.

Taxonomy:

Western Marsh Harrier, Circus aeruginosus

Circus aeruginosus aeruginosus (Add)
Circus aeruginosus harterti (Add)

Circus approximans (Add)

Circus approximans approximans (Add)
Circus approximans gouldi (Add)

Spotted Harrier, Circus assimilis (Add)
Circus buffoni (Add)
Circus cinereus (Add)
Northern Harrier, Circus cyaneus

Circus cyaneus cyaneus (Add)
Circus cyaneus hudsonius (Add)

Pallid Harrier, Circus macrourus (Add)
Circus maillardi (Add)

Circus maillardi macrosceles (Add)
Circus maillardi maillardi (Add)

Circus maurus (Add)
Circus melanoleucos (Add)
Montagu's Harrier, Circus pygargus (Add)
Circus ranivorus (Add)
Circus spilonotus (Add)

Circus spilonotus spilonotus (Add)
Circus spilonotus spilothorax (Add)