TABLE C-8. —Black duck relative recovery rates from pre-hunting- 
season bandings of adult and immature birds, 1959 to 1963 
[Relative recovery rate = lmro . a ^ re recovery rate , 
L J adult recovery rate J 
Location of banding 
1959 
1960 
1961 
1962 
1963 
Wisconsin: 
All locations- 
— 
— 
— 
— 
1.8 
Ontario: 
All locations- 
— 
— 
— 
— 
0.8 
New York: 
Perch Lake- 
1.5 
1.8 
2.3 
1.1 
1.3 
All locations- 
— 
— 
— 
— 
1.4 
Maine: 
Coop. Unit & State- 
1.2 
1.3 
All locations- 
— 
— 
— 
— 
1.3 
Vermont: 
All locations- 
— 
— 
— 
— 
1.7 
Massachusetts: 
Parker River National Wildlife Refuge- 
_ 
_ 
__ 
— 
0.5 
TABLE C-9. - -Regional differences in the recovery rates of black ducks from 1963 
pre-hunting-season bandings in Maine and New York 
Banding location 
Adult 
Immature 
Area of recovery 
Recovery rate 
(percent) 
Relative 
recovery 
rate 
Adult 
Immature 
Maine- 
280 
1,617 
Maine, New Hampshire, 
4.28 
6.00 
1.40 
Vermont, New York, 
and Canada 
South 
2.50 
2.91 
1.16 
New York- 
505 
1,303 
New York, and North 
3.96 
7.75 
1.96 
South of New York 
3.56 
2.61 
0.73 
107 
