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

Table 31. Apparent upland duck nest densities for three habitat types,
Woodworth Study Area, 1966-81.

Table 31. Apparent upland duck nest densities for three habitat types, Woodworth Study Area, 1966-81.
  Nest densities (nests per 40.5 ha)
Species Native Prairie (5,801 ha) Seeded grasslands (1,787 ha) Annually tilled croplands (877 ha) Average
Mallard 1.2 5.2 0.4 1.9
Gadwall 3.7 7.0 0.4 4.1
Northern pintail 0.7 2.9 0.4 1.1
Green-winged teal 0.3 0.4 0.0 0.3
Blue-winged teal 10.0 14.5 1.6 10.1
Northern shoveler 0.7 1.9 0.2 0.9
American wigeon 0.2 0.6 0.0 0.3
Lesser scaup 0.3 0.2 0.1 0.2
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