Exhibit of Giraffes from Smithsonian-Roosevelt African Expedition, c. 1915, Smithsonian Archives - History Div, Two giraffes, specimens from the Smithsonian-Roosevelt African Expedition (1909-1910), are on display in the Mammal Hall at the United States National Museum, now known as the National Museum of Natural History. Other exhibit cases hold additional mammal specimens from the Smithsonian-Roosevelt Expedition..