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Circus
genus of Accipitridae within Accipitriformes

trivial name latin name name specimens
Swamp Harrier
Circus approximans 		Circus approximans 1 1
Hen Harrier
Circus cyaneus 		Circus cyaneus 5 5
Montagu`s Harrier
Circus pygargus 		Circus pygargus 4 4
Western Marsh Harrier
Circus aeruginosus 		Circus aeruginosus 8 8

species comparison1)

1) According to Hartmann (2000a, 2000b and 2016)
genus Circus: maximal number primaries: 10, maximal number secondaries: 16, maximal number retrices: 12

Random specimens

Western Marsh Harrier
Circus aeruginosus
Hen Harrier
Circus cyaneus
Montagu`s Harrier
Circus pygargus
Western Marsh Harrier
Circus aeruginosus
Hen Harrier
Circus cyaneus
Western Marsh Harrier
Circus aeruginosus