Wildlife Monographs
Red Fox Predation on Breeding Ducks
in Midcontinent North America
Tables
Table 3. Percentage species compositions of 1,057 dabbling ducks identified at 501 red fox dens in Barnes, Kidder, and Stutsman counties, North Dakota, relative to population compositions.a,b
| 1969 | 1970 | 1971 | 1972 | 1973 | Avg. | ||||||||
| Dens | Pop. | Dens | Pop. | Dens | Pop. | Dens | Pop. | Dens | Pop. | Dens | Pop. | ||
| Identified ducks at dens (N) | 348 | 260 | 139 | 203 | 107 | ||||||||
| Species Composition (%) | |||||||||||||
| Mallard | 14.4 | 13.0 | 20.8 | 19.4 | 25.2 | 17.6 | 21.2 | 14.4 | 29.0 | 24.3 | 22.1 | 17.7 | |
| Northern pintail | 27.0 | 22.3 | 23.9 | 21.8 | 25.2 | 12.8 | 24.1 | 22.2 | 17.8 | 14.5 | 23.6 | 18.7 | |
| Northern shoveler | 14.4 | 8.3 | 11.2 | 11.6 | 7.2 | 6.1 | 7.4 | 11.4 | 6.5 | 7.4 | 9.3 | 9.0 | |
| Blue-winged teal | 31.0 | 38.0 | 31.5 | 26.2 | 33.1 | 44.7 | 30.0 | 30.6 | 23.4 | 35.2 | 29.8 | 34.9 | |
| Gadwall | 7.2 | 13.3 | 8.1 | 16.7 | 8.6 | 16.6 | 15.3 | 16.0 | 18.7 | 17.0 | 11.6 | 15.9 | |
| American wigeon | 2.3 | 2.6 | 1.5 | 1.5 | 0.0 | 1.0 | 0.5 | 2.8 | 1.9 | 0.5 | 1.2 | 1.7 | |
| Green-winged teal | 3.7 | 2.5 | 3.1 | 2.8 | 0.7 | 1.1 | 1.5 | 2.5 | 2.8 | 1.3 | 2.4 | 2.0 | |
| Pop.= Population | |||||||||||||
aOne hundred thirty-four unidentified dabbling ducks (abount one-half teals) were excluded from this analysis. bPopulation compositions from USFWS Breeding Pair Surveys for Stratum 46.
