68 
Trends 
Despite a substantial reduction in the number of water areas in the 
district, the total duck population did not show a decrease (Table II). Coots 
continued a downward trend. Their decrease since 1949 is 62 percent. 
Table [I - Breeding Pairs and Species Composition, Newdale-Erickson District 
(12 transects - 50.4 square miles) P 

1951 1952 
Species May 15 - June 2 May 6 - 29 
Pairs Species Percent Pairs Species Percent 
Mallard 310 17,0 398 23.9 
Pintail 155 8.5 104 6.3 
Baldpate 147 8.1 132 7.9 
Gadwall 84 4.6 72 4.3 
Shoveler 115 6.3 60 3.6 
Blue-winged teal 467 25.6 357 21.5 
Green-winged teal 99 5.4 88 5.3 
Canvasback 49 2.7 84 opal 
Redhead 78 4.3 66 4.0 
Ruddy 55 3.0 25 1.5 
Lesser scaup 206 11.3 229 13.8 
Others 61 3.3 48 2.9 
Total 1, 826 1,663 
Pairs: Total Ducks - Ratio 1:2,02 1:2. 28 
Pairs per Square Mile 36.2 33.0 
Trend -- - 8.8 percent 
Ducks per Square Mile 73.3 75.1 
Trend aes + 2.5 percent 
Coots per Square Mile 8,4 4.7 
Trend -- - 44.0 percent 
Production 
Trends 
Production dropped 25 percent compared to 1951 with lower production 
of blue -winged teal and diving duck broods largely responsible for the decline 
(Table III). A similar trend in production was indicated by 120 study potholes. 
