1971 



Caldwell, P. J. 1971. Nest microclimate and nesting behavior in the Mallard 

 ( Anas platyrhynchos ) at Delta, Manitoba. M.S. thesis, Univ. Florida/ 

 Gainesville, FL. 



Fog, J. 1971. Survival and exploitation of Mallards ( Anas platyrhynchos ) re- 

 leased for shooting. Dan. Rev. Game Biol. 6: 1-12. 



Gilmer, D. S. 1971. Home ranges and habitat-use of breeding Mallards ( Anas 

 platyrhynchos ) and Wood Ducks ( Aix sponsa ) in north-central Minnesota as 

 determined by radio-tracking. Ph.D. thesis, Univ. Minnesota/Minneapolis. 



Kelleher, J. V. and W. F. O'Malia. 1971. Golden Eagle attacks a Mallard. Auk 

 88: 186. 



Kiel, W. H. , Jr. 1971. A release of hand-reared Mallards in south Texas. 

 Texas Agric. Exp. Station, College Station, TX. 11 pp. 



Lebret, T. 1971. [Observations of surface-feeding ducks (Anatinae) in wing 

 moult in tidal habitat in the Bresbosch-Hollands Diep-Haringvliet-area. ] 

 Limosa 44: 29-44. [In Dutch with English summary.] 



Lockner, F. R. , D. D. Donaldson and J. L. Tartaglia. 1971. Mallards nesting 

 in trees. Calif. Birds 2: 102. 



Mathiason, S. 1971. [A study of a Mallard population in the non-breeding sea- 

 son.] Goteborgs Nat. Hist. Mus . Arstryck: 13-36. [In Swedish with English 

 summary. ] 



Nieman, D. J. 1971. Breeding biology and habitat relationships of Mallard and 

 Canvas-back in the Peace-Athabaska Delta. M.S. thesis, Univ. Saskatchewan/ 

 Saskatoon, SK. 78 pp. 



Ogilvie, M. A. and W. A. Cook. 1971. Differential migration of the sexes and 

 other aspects of the recovery overseas of Mallard ringed at Borough Fen 

 Decoy, Northamptonshire. Wildfowl 22: 89-97. 



Ramsay, A. 0. and E. H. Hess. 1971. Sensitive age parameters and other factors 

 in conditioning to a danger call in Mallard ducklings. Z. Tierpsychol. 28: 

 164-174. 



Weidmann, U. and J. Darley. 1971. The role of the female in the social dis- 

 play of Mallards. Anim. Behav. 19: 287-298. 



Whitten, A. J. 1971. A new behavioural method for further determination of 

 olfaction in Mallard ( Anas platyrhynchos ). J. Biol. Educ. 5: 291-294. 



1970 



Balat, F. 1970. On the wing-moult in the Mallard Anas platyrhynchos in 

 Czechoslovakia. Zool . Listy 19: 135-144. 



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