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Waterfowl Production on the Woodworth Station
in South-central North Dakota, 1965-1981

Table 35. Minimum number of duck broods,
Woodworth Study Area, 1965-81.

Table 35. Minimum number of duck broods, Woodworth Study Area, 1965-81.
Species 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 Range Total
Dabbling duck
Mallard 9 26 8 2 23 12 20 11 4 10 20 3 19 14 9 10 20 2-26 220 13
Gadwall 27 39 15 16 34 13 35 14 5 33 13 17 25 17 11 22 14 5-39 350 21
Northern pintail 20 13 5 5 22 5 2 3 2 13 6 2 3 3 6 3 2 2-22 115 7
Green-winged teal 5 9 7 4 4 3 7 1 1 3 2 0 0 2 0 1 0 0-9 49 3
Blue-winged teal 77 165 131 77 147 67 92 73 30 50 119 12 26 55 72 30 27 12-165 1,250 74
Shoveler 12 16 13 5 19 8 4 8 2 4 6 1 2 7 7 5 1 1-19 120 7
American wigeon 5 5 1 2 4 3 8 4 0 4 1 0 2 4 5 3 7 0-8 58 3
Total dabbling ducks 155 273 180 111 253 111 168 114 44 117 167 37 80 104 111 74 71 37-273 2,170 128
Diving ducks
Redhead 8 2 2 3 3 4 2 2 0 8 4 6 0 2 2 11 3 0-11 62 4
Canvasback 2 4 1 0 1 3 0 1 1 5 2 4 0 1 11 5 13 0-13 54 3
Lesser scaup 5 6 0 3 9 5 7 5 0 1 3 2 0 5 0 8 13 0-13 72 4
Ruddy duck 9 14 10 2 8 5 2 3 0 11 20 25 0 10 1 5 5 0-25 130 8
Ring-necked duck 0 2 1 0 2 0 0 0 0 0 0 2 0 0 0 1 0 0-2 8 0.5
Total diving ducks 24 28 14 8 23 17 11 11 1 25 29 39 0 18 14 30 34 1-39 326 19
Unidentified 0 0 0 2 4 0 3 5 2 1 0 0 1 0 3 0 5 0-5 26 2
Total 179 301 194 121 280 128 182 130 47 143 196 76 81 122 125 104 110 47-301 2,519 148
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