. . . . . . . . . "1930-01-01T00:00:00Z"^^ . . "Bubo virginianus" . . "Perdix perdix" . . "Errington, P. L., F. Hamerstrom, and F. N. Hamerstrom, Jr. 1940. The Great Horned Owl and its prey in north-central United States. Iowa Agricultural Experiment Station Research Bulletin 277:757-850." . . . . "Allen Hurlbert. 2017. Avian Diet Database." .