Tiussa, J. 1972. Sinsoraan, haapanan ja tavin ravlnnosta raetsastyskauden 



aikana. [The autumn food of Mallard, Wlgeon, and Teal during the hunting 

 season.] Suomen Riista 24: 40-46. [In Finnish with English summary.] 



1970 



Watson, G. E. 1970. A presumed wild hybrid Baldpate X Eurasian Wigeon. Auk 

 87: 353-357. 



1968 



Heintzelman, D. S. 1968. An early unrecorded European Widgeon specimen from 

 North Carolina. Chat 32: 76-77. 



1967 



Olney, P. J. S. 1967. The WAGBI-Wildfowl Trust Experimental Reserve. II: The 

 feeding ecology of local Mallard and other wildfowl. Wildfowl Trust Annu. 

 Rept. 18: 47-55. 



1959 



Donker, J. K. 1959. Migration and distribution of the Wigeon, Anas penelope 

 L. , in Europe, based on ringing results. Ardea 47: 1-28. 



Lebret, T. 1959. De dagelijkse verplaatsingen tussen dagverblijf en nachte- 

 lijk voedselgebied bij smienten, Anas penelope L., In einige terrfinen in 

 het lage midden van Friesland. [The daily movements between day quarters 

 and nocturnal feeding grounds of Widgeon, Anas penelope L., in the province 

 of Friesland.] Ardea 47: 199-210. [In Dutch with English summary.] 



Loftin, H. 1959. European Widgeon ( Mareca penelope ) at St. Marks Refuge. Fla. 

 Nat. 32: 146. 



1957 



Teplova, E. N. 1957. [Results of the ringing of Anas penelope in U.S.S.R. ] 

 Trudy Biuro Kol'tsev 9: 144-152. [In Russian.] 



1953 



Lorenz, K. 1953. Comparative studies of the behavior of Anatinae. XVII. The 

 Wigeon and the Chiloe Wigeon. Avicult. Mag. 59: 24-26. 



1952 



Lebret, T. 1952. Pre-moult migration of a female Gadwall ( Anas strepera L. ) 

 and two female Wigeon ( Anas penelope L.). Ardea 40: 75-76. 



White, C. A. 1952. Wigeon summering in Middlesex. Brit. Birds 45: 419. 



150 



