Table 1V. - Comparisons of Minimum Species Breeding Populations in South Dakota. 
1954 Comparison 1950-1954 Comparison 
1955 1954 Avg. 1950-54 
Minimum Minimum Minimum Percent 
Species Population Population Change Percent Change Population Change Change 
Blue-winged Teal 171, 900 345, 900 174, 000 - 50% 344,900 -173,000 - 50% 
Pintail 39, 600 114,500 - 74,900 - 65% 148,000 -108,400 ~- 73% 
Mallard 58,000 109, 200 - 51,200 - 47% 115,700 - 57,700 - 50% 
Shoveler 39, 400 85,200 - 45, 800 ~ 54% 73,100 - 33,700 - 46% 
Gadwall 16,500 38, 500 - 22,000 - 57% 28,300 - 11,800 - 42% 
Redhead 6,400 26, 600 - 20,200 - 76% 22,000 - 15,600 - 71% 
Ruddy 8,900 10, 700 - 1,800 - 17% 11,500 - 2,600 - 23% 
Scaup 13, 800 89, 000 - 75,000 - 84% 34,900 - 21,100 - 60% 
Canvasback Z, 300 2,500 - 200 - 8% 3,300 - 1,000 - 30% 
Baldpate 3,100 | 3, 600 - 500 - 14% _ 4,300 - 1,200 - 28% 
Green-winged Teal 100 300 - 200 - 67% 600 - 500 - 83% 
Wood duck - | - - - 500. - 500 -100% 
Cinnamon Teal - : . “ 100 - 100 -100% 
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Total a 826,000 360, 000 - 466,000 ~ 56% 787,200 -427,;200 - 54% 
96T 

