Ogilvie, M. A. 1967. Population changes and mortality of the Mute Swan in 

 Britain. Wildfowl Trust Annu. Rept. 18: 64-73. 



Perrins, C. M. and C. M. Reynolds. 1967. A preliminary study of the Mute 

 Swan Cygnus olor . Wildfowl Trust Annu. Rept. 18: 74-84. 



1966 



Eltringham, S. K. 1966. The survival of Mute Swan cygnets. Bird Study 13: 

 204-207. 



Halla, B. F. 1966. The Mute Swan in Rhode Island. Proc. N.E. Wildl. Conf., 

 Boston, MA. 15 pp. 



Pantfil, J. 1966. Labedz niemy w wojewodztwie olstynskim. [The Mute Swan in 

 the Olsztyn Voivodship. ] Chronm. Przyr. Ojczysta 22: 66-75, 119. [In 

 Polish with English summary. ] 



Peck, G. K. 1966. First published breeding record of Mute Swan for Ontario. 

 Ont. Field Biol. 20: 43. 



1965 



Boase, H. 1965. Movements of the Mute Swan in East Scotland. Scott. Birds 

 3: 301-310. 



Mathiasson, S. 1965. Preliminar rapport over ringmarkningsstudier av ruggande 

 knopsvanar, Cygnus olor , i Sverige. Goteborg Nat. Hist. Mus . Yrbk. 1965: 

 24-29. [In Swedish with English summary. ] 



Reynolds, C. M. 1965. The survival of Mute Swan cygnets. Bird Study 12: 

 128-129. 



1963 



Berglund, B. E. , K. Curry-Lindahl , H. Luther, V. Ollson, W. Rodhe and G. Seller- 

 berg. 1963. Ecological studies on the Mute Swan ( Cygnus olor ) in south- 

 eastern Sweden. Acta Vert. 2: 161-288. 



Eltringham, S. K. 1963. The British population of the Mute Swan in 1961. 

 Bird Study 10: 10-28. 



Ollson, V. 1963. Ecological studies on the Mute Swan. VIII. Nutritional 

 biology of the Mute Swan in Valdemarsuiken in Smaland and Ostergotland. 

 Acta Vert. 2: 256-264. 



1962 



King, B. 1962. Raw meat as a food for Mute Swans. Wildfowl Trust Annu. Rept. 

 13: 171. 



44 



