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Waterfowl and Habitat Changes
After 40 Years on the Waubay Study Area

Table 9


Table 9. Breeding pairs/haa of undrained wetland by wetland class (Stewart and Kantrud 1971) in the waubay study area, Day County, South Dakota, 1993.
Species Wetland Class
I II III IV III t T-2 T-3 T-4
Dabbling ducks
    Mallard 0.00 1.65 1.11 0.78 2.68 9.58 1.49 5.68
    Gadwall 0.00 1.10 0.63 0.37 2.35 3.07 4.48 5.68
    Northern pintail 0.00 1.10 0.23 0.10 1.17 3.07 1.49 1.14
    Blue-wing teal 0.34 7.16 3.19 1.50 2.85 3.07 0.00 2.27
    Northern shoveler 0.00 0.83 0.39 0.13 0.84 0.77 0.00 2.27
Total dabblers 0.34 11.84 5.55 2.88 9.89 19.56 7.46 17.04
Diving ducks
    Redhead 0.00 0.00 0.23 0.78 0.67 0.38 0.00 9.09
    Canvasback 0.00 0.00 0.00 0.06 0.00 0.00 0.00 0.00
    Ruddy duck 0.00 0.00 0.00 0.29 0.50 0.00 0.00 0.00
Total divers 0.00 0.00 0.23 1.13 1.17 0.38 0.00 9.09
Total 0.34 11.84 5.78 4.01 11.06 19.94 7.46 26.13
a Not calculated for lesser scaup, ring-necked duck, and wood duck because of low pair numbers.

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