CENTRAL FLYWAY 
NORTH DAKOTA-~-Continued 
Late Nesting Index 
Species West Central East State % Comp - 

Mallard -- 8,250 1 12. yy 46.0 
Baldpate ES "756 ret ee 3.0 
Shoveler . -- 756 ~~ 756 3.0 
Gadwall o- 4 493 --- 4 493 18.1 
Blue-winged Teal -- 6 ,OOk -~ 6 ,OOk 2h..1 
Scaup -- 135 -- 735 3-0 
Unidentified* 704 ee ee 704, 2.8 
TOTAL 7Oh 20 994 3,199 2h, ,897 100.0 
*None of the late nesting ducks were identified in the West Stratum. 
Brood Size Observed in Sammle Index 


II 43 2h5 10,681 60 ,882 5.7 
Tit 29 334. 14 ,293 81 ,470 Dot 
Comparison of 1957-1958 Mid-July Aerial Survey 
in North Dakota 

1957 1958 Change 
Broods Actually Seen 140 | 136 
Broods/Square Mile 7 é 
Brood Index 9,250 93 - 164% 
Late Nesting Index ia | = 
Coot Brood Index 11,4 5 5,079 - 50 
Average Brood Size 
Class ITI od ° Le 
Class III 2 of LO 

Conclusions 
Total waterfowl reproduction in 1958, in North Dakota should be 
similar or slightly below the waterfowl reproduced in 1957. 
69 
