northern harriern.North American a hen harrier of the North and Central American subspecies Circus cyaneus hudsonius; formerly called marsh hawk.
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1980 R. T. PetersonField Guide Birds (ed. 4) 152Northern Harrier... Circus cyaneus... Note the white rump.
1995 Experience Lac du Bonnet Spring 38/3 Look for..Northern Harriers cruising low over the fields, and Arctic-bound Rough-legged Hawks hovering above marginal farmland.