Table 3. Comparison of 1957-1959 - Mid-July Aerial 
a 



a a 
Broods actually seen 140 136 NT - 65.4 
Broods per square mile 0.7 0.7 223 
Brood Index 39,250 325937 12,392 
Late Nesting Index L6, 845 2.897 6,840 -~ 772.5 
Pond Index 198,755 299,736 130,075 - 56.7 
Coot Brood Index | LL, 4s 5,079 1,016 - 80 
Average Brood aise 
Class II 5.1 5.7 5.3 
Class III 5.2 567 4.6 
Table 4, Comparison of 1957-59 ~ Mid-July Aerial 
South Dakota 
% Change 
Peet ELSE 

1999 Prom 1958 
Broods actually seen 30 = 
Broods per square mile ell - 
Brood ndex 38, 027 7,110 - 81.3 
Late Nesting Index 59 , 687 8,276 - 86.1 
Pond Index 402,58h 124,764 = 69 
Coot Brood Index 3,000 386 ~ 90.5 
Average Brood Size 
Class II | 4.6 
Class III 4.3 
a nr ln 
78 
