List of Tables - Continued 
Table 
56. 
D7. 
58. 
IIe 
60. 
61. 
Figure 
l. 
2. 
36 
Seasonal changes in sex ratios of adult Mallards in 
nine states of the Mississippi Flyway eoeeeeccosreneeneses 
Regional differences in sex ratios of adult American 
Widgeon sccocceccescreervec esc ee cece reeeeececeeessocoscenee 
Regional differences in sex ratios of adult Pintails ceeceee 
Regional differences in sex ratios of adult Wood Ducks ceo... 
Regional differences in sex ratios of adult Lesser Scaup ... 
Relative vulnerability estimates for the Mallard eocccecoceeecs 
LIST OF FIGURES 
Duck-wing collection enve Lope Ceenveeseoeseeeeeeeecdoacascoseenn 
Request TAPERS: 2 o, ose 8 S10 66 ot 4 avo o eRe ee BO eve Olena ee EO Aes 
Distribution within the Mississippi Flyway of all 
wings received from hunters in the 1959-60 sample ...eeeo. 
Proportions of five species in the kill in four 
regions in MINNEGSOEA csossdsvoseccossvossescecrescvvovserege 
Variation of mallard age ratios within Minnesota 
and Arkansas @eeeeeveeneeeeevoenvneevcee eee eveneennevoeenneneseeneeene 
Direct recoveries in the Mississippi Flyway during the 
1959-60 season of mallards banded in Saskatchewan, 
August 1 through September a3 1959 @eascceocoeceeesecrcoeseeoese 
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