
The progress of the breeding season at the time of the 
survey is guaged by the lone males component. These data have been 
summarized only for the early breeders, pintails, mallards and 
canvasback. These results are given in Table 7. 
Table 7 - Percent Lone Males in Early Nesting Species (Pintail, Mallard 
and Canvasback) 


Year Stratum A Stratum B- Stratum C . Province 
1956 86% 87% 71% 84% 
1957 90% 92% 89% 90% 
Five-Year Average 79% 85% 72% 80% 

Production Indices 
Table 8 presents the summation of our aerial production 
data for 1957 and illustrates far better than words the healthy condition 
of this year's waterfowl crop. 
Conclusions 
Since the breeding population was at least as large as in 
1956, and may have been larger, and since production indices were well 
above average, it is estimated that the fall flight from southern Alberta 
will be considerably larger than last year. 
Although the number of coot broods increased, the breeding 
population was smaller than in 1956. On this basis, it is estimated that . 
the fall flight of this species will remain about the same. 
26 
