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

Table 36. A comparison of species composition of all duck broods and estimated pairs,
Woodworth Study Area, 1965-81.


Table 36. A comparison of species composition of all duck broods and estimated pairs, Woodworth Study Area, 1965-81.
  Percent species composition averaged for 17 years
Species Estimated pairs All broods and indicated broods
Dabbling ducks
Mallard 11 9
Gadwall 14 14
Northern pintail 6 5
Green-winged teal 2 2
Blue-winged teal 46 50a
Northern shoveler 6 5
American wigeon 2 2
Total dabbling ducks 86 86
Diving ducks
Redhead 4 3
Canvasback 1 2a
Lesser scaup 5 3
Ring-necked duck <0.5 <0.5
Ruddy duck 4 5a
Total diving ducks 14 14
aBrood estimates higher than their respective pair estimates may be the result of counting ability or brood immigration onto the area.


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