Ogilvie, M. A. 1962. A nesting study of Mallard In Berkeley New Decoy, Slim- 

 bridge. Wildfowl Trust Annu. Rept. 13: 84-88. 



Olney, P. J. S. 1962. The food habits of a hand-reared Mallard population. 

 Wildfowl Trust Annu. Rept. 13: 119-125. 



Perret, N. G. 1962. The spring and summer foods of the Common Mallard, Anas 



platyrhynchos platyrhynchos (L.), in south central Manitoba. M.S. thesis, 

 Univ. Brit. Columbia/Vancouver, BC. 



1961 



Chura, N. 1961. Food availability and preference of juvenile Mallards. Trans, 

 N. Am. Wildl. Conf. 26: 121-134. 



Gillham, E. H. 1961. Mallard feeding from dead birds. Brit. Birds 54: 357- 

 359. 



Huey, W. S. 1961. Comparison of female Mallard with female New Mexican Duck. 

 Auk 78: 428-431. 



Humphrey, P. S. and G. A. Clark. 1961. Pterylosis of the Mallard Duck. Con- 

 dor 63: 365-385. 



Johnsgard, P. A. 1961a. Wintering distribution changes in Mallards and Black 

 Ducks. Am. Midi. Nat. 66: 477-484. 



. 1961b. Evolutionary relationships among the North American Mallards. 



Auk 78: 3-43. 



Johnson, 0. W. 1961. Reproductive cycle of the Mallard Duck. Condor 63: 351 — 

 364. 



Kear, J. 1961. Early sexual maturity in Mallard. Brit. Birds 54: 427-428. 



Lebret, T. 1961. The pair formation in the annual cycle of the Mallard, Anas 

 platyrhynchos L. Ardea 49: 97-158. 



Matthews, G. V. T. 1961. "Nonsense" orientation in Mallard Anas platyrhynchos 

 and its relation to experiments on bird navigation. Ibis 103: 211-230. 



Wade, D. E. and D. R. Wade. 1961. Mallards do dive. Blue Jay 19: 16. 



Wright, T. W. 1961. Winter foods of Mallards in Arkansas. Proc. 13th Annu. 

 Conf. Southeastern Assoc. Game & Fish Commiss.: 291-298. 



1960 



Billik, M. 1960. Walka krzyzowki z kamionka. [A fight between a Mallard and 

 a Stone Marten.] Lowiec Pol. 3: 15. [In Polish.] 



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