TABLE B-25.—Lone drake index, southern Saskatchewan, 1956-65 
[Expressed as percentage of total drakes] 
Year 
Percent of lone drakes 1 
1956. 
78.5 
1957—. 
80.7 
1958.— 
80.2 
1959-.— 
73.0 
1960.— 
84.7 
1961.— 
71.9 
1962.— 
47.3 
1963-. 
82.6 
1964—. 
83.5 
1965.. 
81.9 
^Includes only mallard, pintail and canvasback. 
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