. . . . . . . . "1978-05-01T00:00:00Z"^^ . . "Buteo regalis" . . "Mammalia" . . "Gilmer, D. S. and R. E. Stewart. 1983. Ferruginous Hawk populations and habitat use in North Dakota. Journal of Wildlife Management 47:146-157." . . . . "Allen Hurlbert. 2017. Avian Diet Database." .