Panyptila melanoleuca. White-throated swift. This image was included in: Reports of Explorations and Surveys .... Volume X. 1859. Plate XVIII. P. 35 of U. S. Pacific Railroad Explorations and Surveys near the 35th Paralllel. Library Call Number F593 .U58 1855.
Photo Category: Treasure - Natural History - Birds
Photo Location: Western United States