The Chicago Academy of Sciences’ mammalogy collection contains mostly small mammals native to the Midwest, as well as some Appalachian species. Specimens are primarily prepared as skins, with some additional osteological and display mount items. Many specimens are associated with collectors or Academy expeditions that have manuscript and /or audio-visual archival material, which can be provided to researchers upon request. Notable collectors include Robert Kennicott, Roy and Edwin Komarek, Alfred M. Bailey, Charles D. Brower, Stephen S. Gregory.