1766-1813 1785-1851 1849-1938 1860-1890 19th-century alexander american-west americanbison audubon biography birds buffalo buildings conservation cultural-conflict descriptionandtravel environmentalism etc frontier frontiersman georgebird great-plains historicbuildings history historynationalaudubonsociety indigenous-peoples iowa johnjames native-americans natural-resources naturalist ornithologists pictorialworks plains-indians postcards preservation ranching structures unitedstates westward-expansion wildlife wildlife-preservation wilson