
Wheres 
number of immatures in the total kill 
“ immature wings : 
total kill (Mail Quest.) x total wings (Wing Coll.) 
Ka = number of adults in the total kill 
Ki 
= total kill (Mail Quest.) x talc (Wing Coll.) 
Ri = immature hunting kill rate = number recovered/number banded 
(adjusted for unreported bands). 
Ra = adult hunting kill rate = number recovered/number banded 
(adjusted for unreported bands). | 
Pi = number of immatures in the pre-season population (unknown). 
Pa = number of adults in the pre-season population (unknown). 
Ki/Ka | 
Pi/Pa = pre-season population age ratio 
Ri/Ra 
Pp = pre-season population 
kill age ratio 
relative recovery rate of immatures to adults 
_ Table 8 summarizes the calculations. The estimate of the 1960 
pre-season population in the Atlantic and Mississippi Flyway is about 
2,000,000 birds with an age ratio of 1.5 immatures per adult. 
_ SUMMARY 
A wood duck banding program was initiated In 1959 in the Mississippi 
Flyway and supplemented by renewed emphasis on wood duck banding in 
the Atlantic Flyway. In 1960, cooperators in the United States and 
Canada banded 10,563 wood ducks, a 49 percent increase over the number 
banded in 1959. Seventy-two percent of the continental total was 
banded in the Mississippi Flyway States. Lack of an even distribution 
of banding effort was noted in that banders in five States (Wisconsin, 
Illinois, Indiana, Ohio, and Iowa) in the Mississippi Flyway banded 
76 percent of the Flyway total and banders in two States (New York and — 
Vermont) banded 61 percent of the Atlantic Flyway total. 
