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Wildlife Monographs

Red Fox Predation on Breeding Ducks
in Midcontinent North America

Tables


Table 2. Percentage species compositions of dabbling ducks identified at red fox rearing dens and in duck populations east and west of the Missouri River in North Dakota and South Dakota, 1968-73.

East Rivera West Rivera
Dens Populationb Dens Populationb
Identified ducks at dens (N) 1452   113  
Species composition (%)
Mallard 20.3 17.0 67.3 40.4
Northern pintail 23.1 19.7 20.4 10.1
Northern shoveler 10.7 9.7 1.8 7.8
Blue-winged teal 31.8 33.8 4.4 19.0
Gadwall 9.2 15.6 2.7 8.8
American wigeon 1.9 1.8 0 10.5
Green-winged teal 3.0 2.3 3.5 3.5


aEast river data are for 1968-73 (North Dakota) and 1968-70 (South Dakota); west river data are for 1968-70.
bAverage of annual USFWS Breeding Pair Surveys for Strata 46 and 48 (east river) and Strata 43 and 44 (west river) weighted by the percentage of total number of species-identified dabbling ducks found at dens in each area each year.

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