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 Northern Harrier (Circus cyaneus).
Northern Harrier (Circus hudsonius) [XC107004]
by Nick Komar from Ile-aux-Grues, Montmagny, Qu\u00e9bec, Canada (call)
Northern Harrier (Circus hudsonius) [XC599328]
by Paul Marvin from Cayucos, San Luis Obispo County, California, United States (alarm call, bark series)
Subspecies
Considered by some authors to be a subspecies of Northern Harrier (Circus cyaneus).