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

Table 8. Number of pairs of ducks,
Woodworth Study Area, 1965-81.

Table 8. Number of pairs of ducks, Woodworth Study Area, 1965-1981.
Species 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 Min-Max
Dabbling ducks
Mallard 51 52 47 68 37 62 35 66 57 33 65 78 35 61 45 63 40 33-78 53
Gadwall 92 86 60 67 53 86 48 74 61 61 83 92 41 79 53 66 50 41-92 68
Northern pintail 53 32 33 14 28 46 24 28 23 38 43 26 15 41 25 49 13 13-53 31
Green-winged teal 15 10 13 7 12 12 11 12 14 4 6 5 4 8 2 10 8 2-15 9
Blue-winged teal 261 236 363 248 227 237 117 216 103 234 314 345 83 283 311 144 103 83-363 225
Northern shoveler 53 23 29 26 31 35 15 26 15 16 34 29 14 46 62 36 17 14-62 29
American wigeon 16 12 14 9 9 15 8 17 16 11 7 6 6 12 6 13 8 6-17 11
Total dabbling ducks 541 451 559 439 397 493 258 439 289 397 552 581 198 485 504 381 239 198-581 424
Diving ducks
Redhead 16 18 5 14 16 9 6 7 2 25 35 34 2 35 38 25 13 2-38 18
Canvasback 22 6 0 2 2 6 1 1 2 2 9 3 4 3 14 18 14 0-22 6
Lesser scaup 19 28 4 13 28 36 17 30 21 32 34 16 22 16 23 31 25 4-36 23
Ruddy duck 40 11 4 9 22 1 1 8 2 43 61 8 7 35 29 15 38 1-61 20
Ring-necked duck 0 5 2 0 1 2 3 0 2 0 1 2 3 1 1 2 0 0-5 1
Total diving ducks 97 68 15 38 69 54 28 46 29 102 140 62 38 90 105 91 90 15-140 68
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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