Erichsen, Walter Jefferson.
1920. Observations on the habits of some breeding birds of Chatham County, Georgia. Wilson Bull., vol. 32, pp. 133-139.
Errington, Paul Lester.
1936. Winter-killing of flickers in central Iowa. Auk, vol. 53, pp. 334-335.
Evermann, Barton Warren.
1889. Birds of Carroll County, Indiana. Auk, vol. 6, pp. 22-30.
Farley, John Austin.
1901. Massachusetts bird notes. Auk, vol. 18, pp. 398-400.
Fisher, Walter Kenrick.
1902. The downy woodpeckers of California. Condor, vol. 4, pp. 68-70.