. . . . . . . . . "Circus hudsonius" . . "Corvus corax" . . "sweiser. 2018. Circus hudsonius associated species with names lookup Corvus corax. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/9572286> on 05 Apr 2018." . . . . "http://iNaturalist.org is a place where you can record what you see in nature, meet other nature lovers, and learn about the natural world." .