207 
exploratory and 4 of little value were not included in the next coverage. For the 9 
rivers run the second time, representing 123 miles, the average was i ae ee 
woodies made up only 28.3 percent of the total waterfowl observed on the first census 
they comprised 93.7 percent during the second check. Of interest is the fact that the 
ratio of drakes to 100 hens dropped from 223 to 50 for the two coverages, respectively. 
Except for one hooded merganser brood, no other 
species were noted as 
nesting along streams. 
Table 1. -- Adult Waterfowl Composition, By Species, On First Coverage Of 13 
River Transects, April 17 - May 18, 1950, And Second Coverage Of 
9 River Transects, May 23 - July 10, 1950 - Indiana 

COVERAGE - COVERAGE 
First Second First Second 
Percent Percent 
_Species =Total Ducks Total Ducks _ Of Total Of Total 
Mallard 31 0 oat pS ae ~ 
Black duck 12 1 1.7 = 
Gadwall 1 = ‘ 5 
_B&ldpate 6 < a = 
Green-winged teal 6 = 3 " 
Blue-winged teal 412 - 58.4 x 
Shoveler 2 Re 2 - 
Wood duck 200 120 28.3 93.7 
Ring-necked duck 4 - - . 
Canvasback 1 m = a 
Lesser scaup 7 2 < <s 
Am. golden-eye 3 F ui E 
Ruddy duck 1 2 - “ 
H,. merganser ll 2 - - 
Am. merganser 5 - - - 
-Red-br. merganser 4 - - = 
Unidentified - l J n 
Total Ducks : 706 . 128 

Coot 59 2 
A total of 60 broods was observed on the 123 miles of rivers censused 
between May 23 and July 10 (Table.2). The number of ducklings in these broods 
totaled 402, for an average of 6.7 per brood. All broods were Class 1. In 1949, the 
average of 35 Class 1 broods recorded on river transects was 6.0 young per brood. 
Since many river. transects were run for the first time this year, no 
comparison can be made with 1949. However, 2 transects were censused both in 
1949 and 1950. On the Muscatatuck, 19 broods were recorded in 1949 and 21 broods 
in 1950, The Elkhart produced 6 broods in 1949 and 4 in 1950. 
The number of wood ducks produced on rivers in 1950 is thought to be about 
equal to that in 1949. 
