R. W. Shufeldt, “Martha’s Autopsy,” (1914).
William Souder, “100 Years After Her Death, Martha, the Last Passenger Pigeon, Still Resonates,” Smithsonian Magazine, (September 2014).
Barry Yeoman, “Why the Passenger Pigeon Went Extinct,” Audubon Magazine. (May-June 2014).
Cincinnati Zoo: Documentary on Martha and Passenger Pigeons, (2014).
360 Degree View of Martha, the last passenger pigeon, on display at Smithsonian.