Las Palmas, Argentina During Secretary Wetmore's Field Work, by Wetmore, Alexander 1886-, July 13, 1920, Smithsonian Archives - History Div, Photograph of Shining cowbirds, Molothrus bonariensis, warming their feet on a cold winter's morning by standing on the back of a horse in Las Palmas within Chaco, Argentina on July 13, 1920. The horse and birds are in a small field next to a one story house. This photograph was taken by Alexander Wetmore, noted ornithologist and sixth Secretary of the Smithsonian Institution, 1944-1952, while conducting field work for the United States Bureau of Biological Survey throughout the islands of the Caribbean and various Latin American countries..