210 
Table 4. -- Comparison of Species Composition on the Same Study Areas, 
Northern Indiana, 1949 and 1950 







1949 1950 
(May 13 -- June 14) (May 11 -- 29) 
No. of Percent No. of Percent 
Species Ducks Of Total Ducks . Of Total 
Mallard | 35 34,3 16 16.3 
Black duck 8 7.8 1 1.0 
Gadwall 0 - 2 2.0 
Baldpate 0 - l 1,0 
Pintail 1 1 1.0 0 re 
Blue-winged teal 35 34.3 48 49.0 
Shoveler 0 - 2 z.0 
Wood duck 11 10,8 5 5.1 
Ring-necked duck l 1.0 4 4.1 
Canvasback l 1,0 1 1,0 
Lesser scaup 6 5.9 17 17.4 
Bufflehead 0 - 1 1.0 
Ruddy duck 3 2.9 0 - 
H. merganser 1 1,0 0 - 
Total ducks 102 100.0 98 100,0 
Coot} 8 26 
Canada goose l 0 
1. Breeding species - all others considered non-breeders. 
Table 5. -- Comparison of Calculated Total Pairs of Breeding Waterfowl on Same 
Study Areas, Northern Indiana, 1949 and 1950 
1949 : 1950 
Un- No. of: Un- No. of 
Species Males Pairs sexed Pairs; Males Pairs sexed Pairs 
Mallard - 20 6 26 * §8 2 4 10 
Black duck 1 2 + 2 l 
Blue-winged teal 17 9 26 * 13 17 30 
Wood duck 7 2 9 * § § 
Coot 8 , 26 
Although 37 percent more blue-winged teal was recorded on the study plots | 
in 1950, 17 pairs were included, as compared with only 9 pairs in 1949. The corrected 
number of total pairs based on observations of lone drakes and pairs was 26 and 30 for 
1949 and 1950 respectively; so little actual change resulted. The 1950 censusing was 
done earlier in the season before hens had commenced incubating. More teal broods 
were located in 1950 by the use of a two-man crew, as compared with censusing by 
one man the previous year. 
Species composition on all study areas, including those above and new ones 
established this year, reveals considerable fluctuation between the first and second 
coverages (Table 6), These data indicate that migrant species were lingering in 
northern Indiana throughout the summer. Lesser scaup constituted the major portion 
of such birds, especially during the latter half of May. 
