ft 
C5 
Table IIT - Brood Comparison of Three Common Species of Ducks According to 
Habitat Utilization, Indiana -- 1951-1952 
Number of Broods Percent Change 
1951 1952 1952 
RIVERS 
Wood duck 68 77 + 13 
POTHOLES 
Mallard 5 9 + 80 
Blue-winged teal 4 2 - 50 
ea a 
Total 77 88 + 14 
In considering all species encountered, 106 miles of river transects 
averaged 0.64 broods per linear mile in 1951 and 0.74 broods in 1952. On the 
13 pothole study areas, representing 14 square miles, the production averaged 
one brood per square mile each year. 
Table IV - Comparison of 1951-1952 Waterfowl Brood Counts * By Species and 
Age Class, All Observations ~- Indiana 

No. Broods No. Observed Brood Average 




Age Class Age Class Age Class Total Total 
Species I Il III Tf MI! Iti I Il III Broods Average 
MAY 7 to JULY 26, 1951 
Mallard ] - q 4 - 40 4.0 - 4.4 10 4.4 
B-w. teal - 4 1 - 31 5 ~ 7.8 5,0 5 coe A 
Wood duck 63 13 6 455 92 34 4ate Tet | 82 7.1 
Hooded merganser - - 1 - - 7 - - 7.0 1 7.0 
Canada peese 2 - - 8 - - 4,0 - - 2 4.0 
Total 100 6.8 
MAY 21 to JULY 25, 1952 
Mallard 6 9 4 49 58 21 8.2 6.4 5.3 19 6.7 
Black duck - H 4 ~ 6 28 - 6.0 7.0 5 6.8 
B-w. teal 3 ] 3 30 11 221 10.0 11.0 7.0 7 8.9 
Wood duck 62 40 12 471 257 79 7.6 6,4 6.6 114 7.1 
Eooded merganser - 2 - - 22 - - 11.0 - 2 11.0 
Canada  zeese 6 1 - 28 5 Ce 4.7 5.0 - 7 4.7 
Total 154 7.0 
* Only whole counts are included in this table. 
