Table 5. Comparison of 1957-1959 - Mid-July Aeria Survey 

Minnesota 
4 Change 
1957 1958 che ae __ From 1958 
Broods actually seen 22 21 10 - 52.4 
Broods per square mile 0.35 0.33 wli> - 
Brood Index 12,566 12, 305. 5,608 - 
Late Nesting Index 14,030 9, 067 1,122 - 87.6 
Pond Index 339,892 314,407 141,322 - 55.1 
Coot Brood Index 4,148 4, 84:7 561 - 90.3 
| Average Size Brood 
Class II | 5.1 567 4.7 
Class III 5.2 Def = 
Conclusions 
There will be a drastic decline in the fall flight of 
‘ducks from North and South Dakota, and a moderate decline from 
Minnesota. 
19 
