Boyd, H. and B. King. 1960. A breeding population of Mallards. Wildfowl 

 Trust Annu. Rept. 11: 137-143. 



Gollop, J. B. 1960. Mallard goes north after nesting. Blue Jay 18: 77. 



Hanson, C. L. 1960. A study of the factors influencing nest site selection in 

 Mallard Ducks, Anas platyrhynchos platyrhynchos . M.S. thesis, Ohio St. 

 Univ. /Columbus , OH. 



Johnsgard, P. A. 1960. A quantitative study of sexual behaviour of Mallards 

 and Black Ducks. Wilson Bull. 72: 133-155. 



Winner, R. W. 1960. Fall and winter movements of Black and Mallard ducks. 

 J. Wildl. Manage. 24: 332-335. 



1959 



Balham, R. W. and K. H. Miers. 1959. Mortality and survival of Grey and Mal- 

 lard Ducks banded in New Zealand. N. Zeal. Dept. Intern. Affairs Wildl. 

 Publ. 5. 



Boyer, G. F. 1959. Hand-reared Mallard releases in the Maritime Provinces. 

 Can. Field-Nat. 73: 1-5. 



Dillon, 0. W., Jr. 1959. Food habits of wild Mallard ducks in three Louisiana 

 parishes. Trans. N. Am. Wildl. Conf. 24: 374-382. 



Geyr von Scheppenburg , H. F. 1959. Zum Verhalten der Stockente. J. Ornithol. 

 100: 397-403. [In German.] 



Johnsgard, P. A. 1959. Evolutionary relationships among the North American 

 Mallards. Ph.D. thesis, Cornell Univ. /Ithaca , NY. 153 pp. 



Winner, R. W. 1959. Field-feeding periodicity of Black and Mallard ducks. 

 J. Wildl. Manage. 23: 197-202. 



1958 



Bellrose, F. C. 1958. Celestial orientation by wild Mallards. Bird-Banding 

 29: 75-90. 



Fog, J. 1958. [Hand-reared Mallards ( Anas platyrhynchos ) marked during 1950- 

 1955.] Dan. Vildtundersog 8: 1-32. [In Danish with English summary.] 



Hunt, R. A., L. R. Jahn , R. C. Hopkins and G. H. Amerlong. 1958. An evaluation 

 of artificial Mallard propagation in Wisconsin. Wisconsin Conserv. Dept. 

 Tech. Wildl. Bull. 16. 79 pp. 



LeBret, T. 1958. The "jump-flight" of the Mallard, Anas platyrhynchos L., the 

 Teal, Anas crecca L. , and the Shoveler, Spatula clypeata L. Ardea 46: 68- 

 72. 



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