Buteo oxypterus, Cassin. A species of hawk. This image was included in: Reports of Explorations and Surveys .... Volume X. 1859. Plate XV. P. 16 of U. S. Pacific Railroad Explorations and Surveys 38th,39th, 41st Parallels. Call Number F593 .U58 1855 .
Photo Category: Treasure - Natural History - Birds
Photo Location: Western United States