1955 
1956 
1957 
1958 
1959 
1960 
1961 
1962 
1963 
1964 
1965 
TABLE B-7. --Lone drake index, southern Alberta, 1955 to 1965 
[Expressed as percentage of total drakes] 
Year 
Mallard 
Pintail 
Canvasba< 
77.30 
81.16 
67.37 
84. 60 
85.09 
63.12 
92.03 
88.82 
81.60 
85. 80 
84.34 
75.47 
70. 66 
73.26 
42.84 
84.92 
82.02 
72.04 
77. IQ 
74.22 
63. 89 
82.39 
83.98 
54.32 
85.44 
85.44 
81.27 
74.94 
88.28 
51.10 
82.47 
74.93 
65.32 
45 
