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

Table 7. Percent species composition of pairs of ducks,
Woodworth Study Area, 1965-81.

Table 7. Percent species compostion of pairs of ducks, Woodwoth Study Area, 1965-81.
Species 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 Min-Max
Dabbling ducks
Mallard 8 10 8 14 8 11 12 14 18 7 9 12 15 11 7 13 12 7-18 11
Gadwall 14 17 11 14 11 16 17 15 19 12 12 14 17 14 9 14 15 9-19 14
Northern pintail 8 6 6 3 6 8 8 6 7 8 6 4 6 7 4 10 4 3-10 6
Green-winged teal 2 2 2 2 3 2 4 3 4 1 1 1 2 1 <1 2 2 1-4 2
Blue-winged teal 41 46 63 52 49 43 41 45 32 47 45 54 35 49 51 31 31 31-63 46
Northern shoveler 8 4 5 6 7 6 5 5 5 3 5 5 6 8 10 8 5 3-10 6
American wigeon 3 2 2 2 2 3 3 4 5 2 1 1 3 2 1 3 2 1-5 2
Total dabbling ducks 84 87 97 92 85 90 90 91 91 80 80 90 84 84 83 81 73 73-97 86
Diving ducks
Redhead 3 4 1 3 3 2 2 1 1 5 5 5 1 6 6 5 4 1-6 4
Canvasback 3 1 0 <1 <1 1 <1 <1 1 <1 1 1 2 <1 2 4 4 0-4 1
Lesser scaup 3 5 1 3 6 7 6 6 7 6 5 3 9 3 4 7 8 1-9 5
Ruddy duck 6 2 1 2 5 <1 <1 1 1 9 9 1 3 6 5 3 12 <1-12 4
Ring-necked duck 0 1 <1 0 <1 <1 1 0 1 0 <1 <1 1 <1 <1 <1 0 0-1 <1
Total diving ducks 15 13 3 8 15 10 10 9 9 20 20 10 16 16 17 19 27 3-27 14
Total pairs 638 519 574 477 466 547 286 485 318 499 692 643 236 575 609 472 329 236-692 492
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