6S 
Percent Departure from Average 
f 90% 
Si 
f ae 
Average 
+ 30% 
- 60% J 
ho 

Trend in Duck, Goose and Coot Populations - Central Flyway 
1949 through 1959 (Comparable Coverage) 
‘J 
ro 
A =a 
| 
on” 
Year 

