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Circus maurus Circus macrourus Circus cinereus Circus cyaneus hudsonius Circus cyaneus cyaneus Circus assimilis Circus approximans Circus spilothorax Circus macrosceles Circus maillardi Circus aeruginosus harterti Circus aeruginosus aeruginosus Circus ranivorus Circus melanoleucos Circus pygargus Circus buffoni
0 1.65 3.30 4.95 7 Time (MYA)
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