3. Crippling losses (based on 1,009 man-day reports); 
1,819 cripples were lost while 4,960 ducks were being bagged, an 
average of 3.7 cripples per limit of 10 ducks. This average includes 
both diving and dabbling ducks. About five divers were lost per 
Jimit, as compared to half that many cabblers. 
4. the 1956 flight: The: flight of 1958 was. heavier and 
Jater than that of 1957, according to reports. We estimate that at 
east © million ducks passed through the Illinois Valley in 1958. 
Nearly a half million ducks were seen at one time during the peak 
of the flight on the Chautauqua Lake Migratory Waterfowl Refuge, near 
Havana. The average number of ducks per acre of Iilinois Hiver bot 
tom-land lake during the fall flight was about 45. Somewhere in the 
neighborhood of 1 out of 40 ducks which entered the valley is be- 
lieved to have been eliminated by hunters. 
5. The 1938 flight by species; The ratio (per cent) of 
mallards to all other species combined, present at various periods 
wore the fall is given in table 2. 
Table 2.--Ratio of mallards to all other ducks, Illinois 
Valley, 1938. 
Mallards All Other Ducks period * 
2 98 Oct. 1-7 | 
24 76 15-22* 
80 20 23-30% 
85 15 Nov. 1-15* 
99 i 16-28" 
98 2 Dec. 1-15 
#1938 hunting season (45 days) 
The relation of the peak and magnitude of the flight, in 
martous species,-to the dates of the 1958 hunting season is repre= 
Sented by the diagram on the preceding page. 
6. Kill per hunter per day: Perhaps the best comparison 
of hunting conditions at various clubs and in various parts of the 
state is the average number of ducks bagged per hunter per day's 
Shoot. On this basis the highest possible score within the law is 
10 ducks per hunter per day; the lowest score is of course O. 
The duck kill-in. the counties along-the Iliinois River is 
shown in table 3. For some counties the figures are more nearly ac- 
eurate than for others because they are based on larger samples. 
