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Circus
genus of Accipitridae within Accipitriformes

trivial name name latin name specimens
Swamp Harrier
Circus approximans 		Circus approximans 1 1
Hen Harrier
Circus cyaneus 		Circus cyaneus 4 4
Montagu`s Harrier
Circus pygargus 		Circus pygargus 2 2
Western Marsh Harrier
Circus aeruginosus 		Circus aeruginosus 7 7

species comparison1)

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

Random specimens

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