222 THE RAPTORIAL BIRDS OF IOWA 



Savage, David L., Birds of the Midland Region: The Midland Monthly, 



Vol. 7, p. 491, 1897. (Southern Iowa.) 

 Wilson, B. H., Wilson Bulletin, 1906, p. 4. 



Bailey, B. H., Two Hundred Wild Birds of Iowa, p. 62, 1906. 

 Widmann, Otto, A Preliminary Catalogue of the Birds of Missouri: 



Trans. Acad. Sci,, St. Louis, pp. 110, 112, 1907. 

 Anderson, R. M., Birds of Iowa, p. 263, 1907. 

 Woodruff, P. M., Birds of the Chicago Area, p. 106, 1907. 

 Cory, C. B., Birds of Illinois and Wisconsin, p. 495, 1909. 

 Bruner, L., Wolcott, R. H., Swenk, M. H., A Preliminary Review of the 



Birds of Nebraska, p. 56, 1909. 

 A. O. U. Check-List, p. 175, 1910. 



tKeyes, Charles Reuben, A History of Certain Great Horned Owls: Con- 

 dor, XIII, pp. 5-19, 1911. 

 Keyes, Charles Reuben, Reprint in Smithsonian Report for 1911, pp. 395- 



405. 



Chapman, P. M., Birds of Eastern North America, p. 315, 1912. 

 tSherrnan, Althea R., Diurnal Activities of the Great Horned Owl: Auk, 



XXIX, p. 240, 1912. 



Bunker, C. D., The Birds of Kansas, p. 148, 1913. 

 Ridgway, R., Birds of North and Middle America, Part VI, Bulletin 50, 



U. S. Nat. Mus., p. 739, 1914. 

 Fenton, Carroll Lane, The Wilson Bulletin, No. 96, p. 138, September, 



1916. (Floyd County.) 



