North America, south to north-western Mexico and south-eastern Virginia (USA). Winters south to northern South America. Considered by some authors to be a subspecies of Hen Harrier (Circus cyaneus).
Northern Harrier (Circus hudsonius) [XC329772]
by Lance A. M. Benner from Venner Meadows, Okanagan-Similkameen, British Columbia, Canada (call)
Northern Harrier (Circus hudsonius) [XC164238]
by Bobby Wilcox from west end of Monument Rd, Tijuana River Valley, San Diego Co, California, United States (call)
Subspecies
Considered by some authors to be a subspecies of Hen Harrier (Circus cyaneus).