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 approximans (Add)
Circus approximans gouldi (Add)

Northern Harrier, Circus cyaneus

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

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

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