Progress of Nesting 
This year the lone drake factor was 60%, 8% higher than in 1957 
which, according to prairie standards would indicate early nesting, However, 
in 1957, an exceptionally late season, it was 10% higher than the year a? 
before. : ; 
Conclusions 
Except for the Athabaska Delta there is nothing foresseeable 
that would tend to restrict production. Consequently we believe that 
changes in production and fall flight will be comparable to the percent 
changes in the breeding populations. 
